Italian Sardinian Red Prawn with Cabras Bottarga, Caviar and Light Potato Cream | Gambero Rosso, Bottarga di Cabras e Caviale con Crema Leggera di Patata

Sep 23

11 min read

Gambero Rosso, Bottarga di Cabras e Caviale con Crema Leggera di Patata (Italian Sardinian Red Prawn with Cabras Bottarga, Caviar and Light Potato Cream)

This is the plate where Sardinian fine dining stops cooking and starts measuring. Three ingredients with enormous marine personality share one spoon: Mediterranean red prawn, bottarga di muggine from the lagoon at Cabras, and caviar. Two are cured and salty. The prawn is the only sweet and fragile one, and everything else is there to serve it.

Gambero rosso, landed off the western Sardinian shelf, has flesh so tender that heat is almost always a loss. Raw it is sweet and faintly resinous, closer to scallop than to shrimp. Thirty seconds in a hot pan takes that sweetness away. This version serves both states, a raw tartare and a barely warmed tail.

The potato cream is the answer to a salt problem. Bottarga and caviar carry a great deal of sodium, and without a neutral fatty base they flatten the prawn instead of framing it. A light cream built on olive oil gives body and gentle sweetness while staying quiet, and it sets up the contrast: warm underneath, cold on top, nothing hot anywhere.

Yield: 4 appetizer servings. Prep: 45 minutes. Cook: 25 minutes. Chill: 30 minutes. Total: about 1 hour 40 minutes. Difficulty: advanced. Course: antipasto. Region: Sardinia, Oristano and the western coast.

The Story

Bottarga di Cabras is the oldest of the three ingredients and the only genuinely Sardinian one. It is the roe sac of grey mullet from the Stagno di Cabras, the brackish lagoon behind the gulf of Oristano, fished with fixed trap systems since Phoenician times. Salting, pressing and air drying the intact sac preserved a seasonal glut; it was never meant as a luxury.

What separates it from Sicilian tuna bottarga is the animal and the water. Mullet roe is finer grained, paler, more amber than orange, with a nutty almond note under the salt where tuna bottarga is heavier and more mineral. A good sac is still yielding at the centre, never chalky, and smells of clean sea.

The red prawn belongs to the same coast but a different fishery. Aristeus antennatus is trawled from between 1300 and 2600 feet (400 and 800 metres), and the deep cold gives it its colour, its sweetness and its very short shelf life. Boats out of Porto Corallo freeze it at sea within minutes. Caviar is the outsider, present for texture rather than tradition.

Ingredients

For the prawns

Whole Mediterranean red prawns, gambero rosso, 16 pieces, about 2 lb (900 g) whole weight
Fine sea salt, 1/4 tsp (1.5 g)
Extra virgin olive oil, 2 tsp (10 ml)
Finely grated lemon zest, from 1/4 lemon
Freshly ground white pepper, to taste

For the light potato cream

Yellow fleshed waxy potatoes, 12 oz (340 g)
Potato cooking water, reserved, about 1/2 cup (120 ml)
Mild extra virgin olive oil, 3 tbsp (45 ml)
Whole milk, 2 tbsp (30 ml)
Fine sea salt, 1/4 tsp (1.5 g), plus more for the cooking water
Freshly ground white pepper, to taste

For the sear

Extra virgin olive oil, 1 tbsp (15 ml)
Garlic clove, lightly crushed, 1
Fine sea salt, 1 small pinch

For finishing

Bottarga di muggine di Cabras, whole pressed sac, 1 1/2 oz (45 g)
Caviar, Oscietra or Baeri, 1 oz (30 g)
Excellent finishing olive oil, 2 tsp (10 ml)
Chives, very finely sliced, 1 tsp
Lemon, 1/2, for zest only
Fleur de sel, a few grains per plate

Preparation

Step 1

Clean and split the prawns. Twist the heads off all sixteen and reserve them, peel eight tails completely and leave the last segment on the other eight. Slide a knife tip along each back and lift out the dark tract. Rinse nothing under running water: red prawn flesh absorbs it at once and turns woolly. Wipe with a damp cloth and refrigerate on a cold tray.

Step 2

Cook the potatoes. Boil them whole in their skins in well salted water, from cold, until a knife slides through the centre without resistance, about 25 minutes. Cooking them unpeeled keeps water out of the flesh, and every extra gram of water is a gram of dilution. Reserve half a cup of the cooking water, then peel them while still very hot.

Step 3

Build the cream. Pass the hot peeled potatoes through a ricer or a fine mouli. Never put potato in a blender: the blade ruptures the starch cells and the result is glue within seconds. Add the milk and a third of the reserved water, then stream in the oil while stirring with a spatula. Season and loosen with more water until the cream settles level.

Step 4

Strain and hold the cream. Pass it through a fine mesh sieve, cover the surface directly with film and hold it at around 130°F (55°C) over a low bain marie. Warm, not hot: above 140°F (60°C) it starts to cook the raw tartare it touches, and cold it turns stiff and pasty. Stir often and loosen with warm cooking water if it tightens.

Step 5

Slice and grate the bottarga. Peel the thin wax membrane off slowly so the roe underneath does not tear. Slice half into very thin translucent sheets, laying them flat on a cold plate. Grate the other half on a microplane into a dry powder. Bottarga dulls within an hour of being cut, so do this close to service.

Step 6

Make the tartare. Cut the eight peeled tails by hand into pieces of about 1/4 inch (6 mm). Never use a machine: red prawn releases its liquid the moment the cells are crushed, and a minced tartare turns watery in minutes. Dress with the oil, lemon zest, white pepper and only 1/4 teaspoon of salt. Hold cold for no more than 20 minutes.

Step 7

Sear the eight whole tails. Heat a heavy pan over medium high heat with the oil and the crushed garlic until the garlic just colours, then discard it. Lay the tails in, count 20 to 25 seconds, turn them, give ten seconds more, then lift them onto a cold plate. The centre must stay translucent and almost raw.

Step 8

Season and shape. Season the seared tails with a pinch of salt and a few grains of fleur de sel while warm. Stir the tartare once more, taste a piece and correct the acidity only, never the salt. Shape four quenelles between two cold teaspoons, or press the tartare into a ring mould on each plate. Keep them chilled until the plates are dressed.

Plating

Use wide flat plates at room temperature, never warmed and never chilled. A warm plate pushes the tartare past the point where raw prawn tastes sweet, and a cold plate seizes the cream into a pale paste. Have everything within reach: the assembly has to be carried in under three minutes.

Spoon about 3 tablespoons of warm potato cream slightly off centre and let it find its own level rather than spreading it. Set the tartare quenelle directly on the cream, then lean two seared tails against it so the two read as one composition. Drape three or four translucent sheets of bottarga over the tartare so the light comes through them.

Add the caviar last and with restraint, a scant teaspoon placed on the quenelle, using a mother of pearl or plastic spoon. Dust the exposed cream with grated bottarga, add a few drops of finishing oil, a pinch of chives and two grains of fleur de sel on the tails only. Send the plate immediately.

Professional Technique

The controlling technique is salt accounting, done on paper before it is done in the kitchen. Bottarga runs at roughly 5 to 6 percent salt and caviar at around 3.5 percent, and together they contribute more sodium than any hand seasoning would. That is why the tartare takes only a quarter teaspoon for eight tails, why the cream is underseasoned, and why the only salt at the pass is fleur de sel on the tails, tasted as texture rather than absorbed.

The second is splitting one prawn into two thermal states. Raw flesh gives sweetness and a soft slippery texture; a tail seared twenty seconds gives a thin caramelised surface and a roasted aroma from the Maillard reaction at the edges, over a centre that is still raw. The guest tastes the ingredient and then tastes what heat does to it. It hides nothing: if the prawns are not first class, the plate says so.

The third is the ricer. Starch granules swell and hold their shape when a potato is cooked whole in its skin, and a ricer separates them without breaking them, which gives the cream its clean silky body. Any blade tears them open and releases free amylose, and the cream turns gluey in under ten seconds. Here the wrong tool produces an unrecoverable failure.

Texture and Moisture Control

Three temperatures are in play and all three are narrow. The cream sits at about 130°F (55°C), below the point where prawn protein sets. The tartare leaves the refrigerator at around 39°F (4°C) and should never wait on the pass. The seared tails arrive between the two, warm at the surface and cool at the core. If one drifts, the plate loses its contrast.

Moisture is the second battle and the prawn is the source. Its flesh is about 78 percent water held in a delicate protein structure, and both rinsing and over handling release it. Every drop that leaks out pools under the quenelle, thins the cream and greys the plate. Cut by hand, dressed at the last moment and kept cold, the tartare stays glossy.

The cream moves the other way. Over a bain marie it loses water and tightens, so slacken it with warm cooking water rather than milk, which would push it towards dairy. Bottarga sliced too early dries at the edges and curls. Caviar left out softens and the eggs collapse against each other, which is why it stays on ice until the last second.

Professional Mise en Place

This is a three minute assembly supported by an hour and a half of preparation, and it fails far more often because something was not ready than because something was cooked badly.

Equipment and tools

Potato ricer or fine mouli, and a fine mesh sieve
Mandoline or a very sharp thin bladed knife for the bottarga
Microplane for grating bottarga and lemon zest
Heavy pan for the sear, plus a cold plate to stop the cooking
Mother of pearl or plastic spoon, two cold teaspoons for quenelles
Small bain marie held below a simmer, and a probe thermometer

Prepared ahead

Potatoes boiled, riced and the cream built, up to 3 hours ahead
Prawns cleaned and deveined, eight peeled and eight left tail on
Bottarga membrane removed, sac ready but not yet sliced
Chives sliced, lemon zested, oil and fleur de sel decanted
Plates set out at room temperature, caviar unopened and on ice

Service setup

Potato cream at 130°F (55°C) over the bain marie, covered
Tartare dressed no more than 20 minutes before service
Bottarga sliced within 30 minutes of service, covered and cold
Sear pan hot, one pass only, tails onto a cold plate
Caviar on ice at the pass, opened at the last moment

Chef Tips

Buy the prawns frozen at sea unless you know the boat landed that morning. Enzymes in the head soften the tail flesh within hours, and a prawn frozen on deck twenty minutes after the net came up beats one that has spent two days on ice. Thaw overnight in the refrigerator, never in water.

Keep the sixteen heads. They hold the coral that carries most of the flavour of the animal. Roast them briefly, cover with water and a splash of dry white wine, simmer twenty minutes and strain hard, and you have a free bisque base for another dish. It has no place on this clean plate, but it should not go in the bin.

Taste the bottarga before you commit to a quantity. Salt varies enormously between producers and between sacs, and a strongly cured piece can carry half again the sodium of a mild one. If yours is aggressive, slice it thinner and reduce the grated dusting.

Choose the caviar for size and firmness rather than price. A medium grain Oscietra or Baeri with eggs that separate cleanly and pop is right; a very soft caviar disappears under the bottarga. Open the tin at the pass, never in advance.

Common Mistakes

Cooking the whole tails through. Twenty to twenty five seconds on one side and ten on the other is the entire cooking time, and the centre must stay translucent. A prawn taken to uniform opacity has lost its sweetness permanently.

Blending the potato. Any blade releases free starch and turns the cream gluey within seconds. Use a ricer or a fine mouli and finish with a spatula. Thinning, seasoning and straining will not fix it.

Rinsing the prawns under the tap. The flesh absorbs water at once, the tartare goes woolly and pale, and the tails then refuse to colour. Wipe with a damp cloth and pull the tract out with a knife tip.

Salting as if the cured elements were not there. Bottarga and caviar bring most of the salt here. Season the tartare and the cream to taste on their own and the finished dish is inedible, and salt cannot be taken back out.

Slicing the bottarga too early. Cut sheets oxidise, dry and curl within an hour, losing the translucency and the almond note. Slice within thirty minutes of service and keep them flat, covered and cold.

Serving the potato cream too hot. Above 140°F (60°C) it sets the tartare sitting on it and the quenelle turns opaque at the base. Hold it at 130°F (55°C) and check with a thermometer, not by feel.

Spooning caviar with metal. Metal bruises the eggs and leaves a tinny note on the most delicate thing on the plate. Use mother of pearl, horn or plastic, and place the caviar rather than scattering it.

Wine Pairing

Vermentino di Gallura DOCG: The Sardinian answer and the most complete one. Grown on decomposed granite, it has a saline bite that meets the bottarga on its own terms, and a firm citrus acidity that lifts the fat of the cream. The bitter almond on the finish echoes the almond note of good mullet roe.

Franciacorta DOCG: Metodo classico from Lombardy and the technical choice for caviar. The fine persistent mousse scrubs the palate between mouthfuls of warm cream, and the bread and hazelnut of long lees ageing sit beside the roe rather than competing. Choose extra brut or non dosato: residual sugar would make the prawn taste cloying.

Trento DOC: The alpine alternative when Franciacorta feels too broad. Grown at altitude in Trentino, it is leaner and more sharply defined, with white flower and green apple rather than bread crust. That cut works against three salty elements, and the tighter body leaves the raw prawn at the front of the palate.

Etna Bianco DOC: Carricante grown on volcanic soil at 2000 feet (600 metres) and above, the most interesting still white here. It has a stony smoky depth and a briny finish that reads as an extension of the sea rather than a contrast, with enough acidity for the cured roe. A little age gives it a waxy texture that suits the cream.

Cirò Bianco DOC: Greco Bianco from the Calabrian coast and the quiet option. It is less aromatic than the others, with soft citrus, a touch of herb and a saline finish, and that restraint is its value beside bottarga and caviar. It refreshes and then disappears, which few whites manage at this level of salinity.

Storage & Reheating

The assembled plate has no storage life and should never be built in advance. Raw tartare must be eaten within 20 minutes of being dressed, and neither it nor the seared tails should be held for a second service. Prawn cooked, chilled and brought back turns rubbery.

The potato cream is the one component that keeps. Refrigerated in an airtight container with the surface covered directly, it holds for 2 days. Rewarm it over the lowest heat, stirring constantly, and loosen it with warm water rather than milk. Do not boil it and do not freeze it: riced potato separates on thawing into a grainy mass.

Bottarga keeps longest. A whole uncut sac wrapped in parchment and then foil holds several months refrigerated. Once cut, wrap the exposed face tightly and use it within 2 weeks. Opened caviar must be eaten within 2 days, on ice at around 30°F (minus 1°C), tin closed and weighted. Never freeze it: the eggs rupture.

Nutrition

Per serving, based on 4 appetizer portions:

Calories: 340 kcal
Total Fat: 20 g
Saturated Fat: 3.5 g
Trans Fat: 0 g
Unsaturated Fat: 16 g
Cholesterol: 235 mg
Sodium: 980 mg
Total Carbohydrates: 16 g
Fiber: 1.5 g
Total Sugars: 1 g
Added Sugars: 0 g
Protein: 24 g
Lactose: 0.3 g
Principal micronutrients: omega 3 fatty acids, vitamin B12, selenium, iodine, phosphorus, potassium, zinc