Italian Tuna Tartare | Tartare di Tonno
Updated: Sep 13
Tartare di Tonno is what a good Italian kitchen does when the fish is so fresh that cooking it would be a waste. There is no heat in this recipe and almost no technique in the theatrical sense. There is a piece of tuna, a knife, a cold bowl and a handful of seasonings measured with restraint. Everything that makes the dish good happens before the plate leaves the pass: how the fish was handled, how cold it stayed, how it was cut and how late it was dressed.
The Sardinian version adds grated bottarga di muggine, the cured mullet roe that gives the island its most recognisable savoury note, and a shard of pane carasau for crunch. Those two additions turn a French idea into an Italian one.
Serves 4. Prep: 25 minutes. Chilling: 30 minutes. Total: 55 minutes.
The Story
Italy did not need a French idea to eat raw fish. Along the coasts of Puglia and Sicily, crudo has been eaten for as long as boats have landed, seasoned with nothing more than sea water, oil and lemon, straight off the deck. What the word tartare brought from Paris in the twentieth century was not the concept but the form: the fine dice, the cold bowl, the measured seasoning, the ring mould.
Tuna gave Italy two of its great fishing cultures. The tonnare of Favignana in Sicily and of Carloforte, on the Sardinian island of San Pietro, built entire towns around the spring migration of bluefin through the channel. The mattanza, the system of chambered nets that gave those towns their calendar, ran until the stocks and the economics failed. Carloforte still holds its Girotonno each summer, and the Ligurian dialect spoken there is a reminder that the tuna men came from Pegli, brought south by the Savoy crown in the eighteenth century.
The Sardinian accent in this version comes from Cabras, on the western lagoons, where grey mullet roe is salted, pressed and dried into bottarga di muggine. Grated over cold tuna it does what an anchovy does for a braise: it adds a depth that tastes of the sea rather than of fish, and it seasons the dish at the same time.
Ingredients
For the tartare
Sushi grade bluefin tuna loin, previously frozen, 10 1/2 oz (300 g)
Extra virgin olive oil, Sardinian if possible, 1 tbsp (15 ml)
Fresh lemon juice, 1 tsp (5 ml)
White balsamic vinegar, or aged white wine vinegar, 1 tsp (5 ml)
Bottarga di muggine, finely grated, 1 tsp (3 g)
Capers in salt, rinsed and finely chopped, 1 tsp (5 g)
Shallot, finely minced, 1/2 small
Fresh chives, finely chopped, 1 tsp (2 g)
Fleur de sel or fine sea salt, 1/2 tsp (3 g)
Freshly ground black pepper, 1/4 tsp (0.5 g)
For the garnish
Pane carasau, broken into shards, 2 sheets
Ripe avocado, blended smooth, 1/2
Fresh lemon juice for the avocado, 1 tsp (5 ml)
Microgreens or wild fennel fronds, 1/4 cup (5 g)
Extra virgin olive oil for finishing, 2 tsp (10 ml)
Preparation
Checking and Chilling the Tuna
Buy the loin in one piece and keep it in the coldest part of the refrigerator, ideally sitting over a tray of ice with the fish wrapped so that no meltwater touches it. Thirty minutes before service, move the loin to the freezer. You are not freezing it again, you are dropping the surface to around 28F (minus 2C) so that the flesh firms and the blade can pass cleanly. Unwrap it, blot both faces dry with paper towel, then trim away the dark lateral muscle, the central sinew line and any silver membrane.
Setting Up the Cold Station
Put the mixing bowl, the serving plates and the ring mould in the freezer alongside the fish. Chill the knife blade under cold running water and dry it. Everything that will touch the tuna should be colder than the tuna. Mince the shallot, rinse the salted capers under cold water for a full minute and chop them fine, cut the chives, and grate the bottarga on the finest microplane you own. Measure the oil, the lemon juice and the vinegar into separate small containers. Nothing goes together yet.
Cutting the Tuna by Hand
Work on a cold board with the sharpest knife you have. Slice the loin against the grain into planks about 1/4 inch (6 mm) thick, lay the planks flat, cut them into strips of the same width, then turn the strips and cut across into neat cubes. Keep every stroke long and single. Do not saw, do not press down, and never reach for a food processor or a meat grinder. Transfer the cubes to the chilled bowl as you go and return the bowl to the freezer between batches.
Building the Oil Base
In a second cold bowl, whisk the olive oil with the minced shallot, the chopped capers and the chives. This carrier goes onto the fish first, with no acid in it at all, because the oil coats every cube and buys you a few minutes of protection. Taste the mixture on its own. The capers and the bottarga both carry salt, so the amount of fleur de sel you will need at the end has to be judged against how salty this base already tastes. Keep it cold until the plates are ready.
Seasoning at the Last Second
With the guests seated and the plates in front of you, fold the oil base through the tuna with a rubber spatula, lifting rather than stirring. Add the lemon juice and the white balsamic vinegar, then the fleur de sel and the black pepper, and fold three or four more times. Grate the bottarga over the top and fold once more. From the moment the acid touches the fish you have roughly two minutes before the surface begins to pale. Plate immediately and send the dish out.
Plating and Presentation
Set the chilled ring mould in the centre of a cold plate and spoon the tartare in loosely, pressing only enough with the back of a spoon to make the sides hold their shape. Compacting the dice squeezes out the liquid you spent the whole recipe protecting. Lift the ring straight up, without twisting.
Spoon the avocado puree in a comma beside the tuna rather than underneath it, so that the two textures stay separate until the fork brings them together. Lean two shards of pane carasau against the mound at an angle, tuck a small handful of microgreens or wild fennel where the shards meet, and finish with a thread of olive oil around the base. Serve the moment the plate is built.
Professional Technique
Fish destined to be eaten raw has to be frozen first. Anisakis, a parasitic nematode present in many wild marine species, is neutralised reliably by cold, and the food safety authorities set the conditions precisely: both the United States FDA and European Union rules accept minus 4F (minus 20C) held for seven days, or minus 31F (minus 35C) held for about fifteen hours in commercial blast equipment. This is not a scare story and it is not optional. In practice, tuna sold as sashimi grade in Japan, in the United States and across most of Europe has already been through that treatment at sea or at the processor, often far colder and for longer than the minimum. Ask the fishmonger directly whether the fish was frozen and at what temperature. If the answer is vague, do it yourself in a freezer that genuinely holds minus 4F (minus 20C), for a full week.
The second half of the technique is the knife. Tuna muscle is built from long fibres bundled between thin sheets of connective tissue. A sharp blade cuts across those bundles and leaves the cut faces intact and glossy. A food processor or a meat grinder does not cut, it tears: the blades drag the fibres apart, rupture the cells and release the liquid held inside them, and within a minute the tartare has collapsed into a grey paste sitting in its own juice. Cold flesh resists the blade far less, which is why the colder the loin, the cleaner the cut.
Colour is chemistry. The red of tuna is myoglobin, and the moment a cut face meets air the pigment begins to oxidise from bright red towards brown. Acid accelerates the change and does more besides: lemon juice and vinegar denature the surface proteins in exactly the way heat does, turning the outer millimetre opaque and chalky within minutes. Cut as late as you can, dress later still, and let the acid touch the fish only when the plate is about to leave your hands.
Texture and Moisture Control
Salt is the clock in this dish. Sodium draws water out of the tuna by osmosis, and once that liquid has left the cells it does not go back: the cubes shrink, turn firm and sit in a pink pool. That is why the fleur de sel goes in at the very last second and never a minute earlier, and why capers preserved in salt have to be rinsed thoroughly before they go anywhere near the fish.
Olive oil does the opposite work. It films each cube in a layer that slows the exchange of air at the surface, which buys a little time against both drying and browning. Use enough to coat every piece, not enough to pool in the bowl.
Then there is the bite. Tartare on its own is uniformly soft, and the palate stops registering that softness after four or five mouthfuls. The crackle of toasted pane carasau, or the sharp snap of a thinly sliced spring onion, exists to reset the mouth between forkfuls.
Professional Mise en Place
Everything except the final fold happens ahead of service. The fish is trimmed, the aromatics are cut, the oil base is mixed and the plates are in the freezer, so that when the order comes there are only thirty seconds of work left to do.
Freeze the tuna at minus 4F (minus 20C) for seven days if it was not commercially frozen, then thaw it overnight in the refrigerator.
Trim, portion and wrap the loin up to six hours ahead and hold it on ice in the coldest part of the refrigerator.
Mince the shallot, rinse and chop the capers and cut the chives up to two hours ahead, each in its own covered container.
Blend the avocado with lemon juice no more than one hour ahead and press plastic film directly onto the surface so that it cannot brown.
Chill the bowl, the ring mould, the knife and the serving plates, and cut, dress and plate a la minute.
Chef Tips
Ask for a centre cut piece of the loin rather than the tail end. The muscle there is even, the sinew runs in one direction and the cubes hold their shape.
Taste the oil base before it meets the fish. Capers and bottarga both bring salt, and the final seasoning has to be judged against them rather than added blindly.
If the tuna feels slack rather than firm when you press it, it has been thawed and refrozen. Do not serve it raw, cook it instead.
Send the tartare out on plates taken straight from the freezer. The cold surface holds the dish at temperature for the ten minutes a first course actually spends on the table.
Common Mistakes
Using a food processor to save time: the blades tear the fibres instead of cutting them, the cells burst and the tartare turns to grey paste within a minute. There is no shortcut available here. Cut by hand, with a sharp knife, on a cold board.
Dressing the tuna in advance: acid and salt both start working the moment they touch the fish, bleaching the surface and pulling out water. A tartare mixed even ten minutes early arrives pale and watery. Mix at the pass, not in the kitchen.
Packing the ring mould tight: pressure crushes the cubes and squeezes out the liquid you cut them carefully to keep inside. Fill the ring loosely and level the top with the back of a spoon, nothing more.
Trusting the word fresh instead of asking about freezing: fresh is not the same as safe for raw service. Ask the fishmonger whether the fish was frozen, to what temperature and for how long, and if you cannot get a clear answer, freeze it yourself before you dice it.
Wine Pairing
Vermentino di Gallura DOCG: The Sardinian answer to a Sardinian plate. Granite soils in the north of the island give this Vermentino a saline, almost briny edge and a bitter almond finish that reads as a continuation of the bottarga rather than a contrast to it. The citrus acidity is firm enough to refresh the palate after the olive oil without overpowering the delicacy of raw fish.
Etna Bianco DOC: Carricante grown on volcanic sand carries a stony lemon pith tension and very high natural acidity, which is exactly what a dish dressed with lemon and vinegar wants beside it. The faintly smoky mineral character picks up the toasted note of the pane carasau, while the lean body leaves the tuna as the richest thing on the table.
Cerasuolo d'Abruzzo DOC: A serious rosato rather than a pale afterthought, made from Montepulciano bled off its skins after a few hours. It has enough red fruit and gentle tannic grip to meet the iron note of bluefin, which many whites leave exposed, while the acidity and a cool serving temperature of 54F (12C) keep it firmly in the fresh camp.
Storage and Reheating
There is no reheating here and very little storage. Dressed tartare is a service item and does not keep: once the acid and the salt are in, the texture declines within the hour, so the dish should be eaten the moment it is plated. Undressed trimmed tuna, wrapped tightly and held on ice in the coldest part of the refrigerator, lasts twenty four hours at the very outside. If any tuna is left after that day, do not serve it raw: sear it hard on all four sides and use it warm in a salad.
Nutrition Information
Calories: 215
Total Fat: 12 g
Saturated Fat: 2.2 g
Trans Fat: 0 g
Unsaturated Fat: 9.3 g
Cholesterol: 40 mg
Sodium: 520 mg
Total Carbohydrates: 9 g
Fiber: 2 g
Total Sugars: 0.8 g
Added Sugars: 0 g
Protein: 18 g
Lactose: 0 g
Potassium: 380 mg
Selenium: 55 mcg
Vitamin B12: 6 mcg
Vitamin D: 4 mcg
Iron: 1.4 mg
Allergens: fish, and gluten from the pane carasau. The bottarga and the capers are the main sources of sodium in the dish.
These values are estimates for one of four servings and will shift with the cut of tuna, the quantity of olive oil and how much pane carasau is served alongside.
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