Trieste Sweet and Sour Sardines | Sarde in Savôr alla Triestina
Savôr is what Trieste calls the vinegar preserve that kept small fish edible through a hot week before refrigeration, and the word is Friulian rather than Italian. Sardines come out of the gulf in quantity in early summer, so they were floured, fried and buried in a sweet and sour bath of onions and spiced vinegar, then left in a cool cellar for two days.
What separates the Triestine savôr from the versions made further down the Adriatic is the spice drawer and the sugar. Trieste spent five centuries as the seaport of Vienna, and its kitchen still reads that way: white wine vinegar instead of red, a spoonful of sugar to round the acid, bay, cloves and cinnamon in the pan, raisins swollen in wine, a handful of pine nuts.
It is eaten cold with soft white polenta beside it, and it improves across the first forty eight hours. Everything depends on the frying, because a sardine fried badly disintegrates once the vinegar reaches it, and no amount of resting repairs that.
Yield: 4 servings as a secondo, 6 as an antipasto. Prep: 35 minutes. Cook: 40 minutes. Rest: 48 hours, not optional. Difficulty: intermediate. Region: Friuli Venezia Giulia, Trieste and the Karst coast.
The Story
The dish belongs to the fishing villages along the gulf, Barcola, Santa Croce and Muggia, where sardines arrived by the crate and had to be dealt with the same evening. The name comes from the Latin sapor, flavour, and it names a method rather than a recipe: fry, drown in spiced vinegar and onion, wait.
The Habsburg centuries are what made the Trieste version taste the way it does. After 1719, when Charles VI declared the city a free port, cloves, cinnamon, pepper and sugar came through the harbour in bulk and stopped being luxuries in local kitchens. Cooks here put them into the savôr as a matter of course, which is why the Trieste pan smells of a spice market while the Venetian one, across the same gulf, stays on onion and vinegar alone.
It still turns up in the osmize, the Karst farmhouse taverns Joseph II authorised in 1784 so growers could sell their own wine and food for a few weeks a year, and on home tables all summer. The polenta beside it is white, from the pale maize of this corner of the northern Adriatic, and served soft rather than set. That sweetness is what makes the vinegar bearable in quantity.
Ingredients
For the sardines
Fresh sardines, scaled, gutted and boned, 2 1/4 lb (1 kg) whole weight
All purpose flour, 1 cup (125 g)
Sunflower or peanut oil for frying, 4 cups (950 ml)
Fine sea salt, 1 tsp (6 g)
For the savôr
Yellow onions, sliced thin, 2 lb (900 g)
Extra virgin olive oil, 1/3 cup (80 ml)
White wine vinegar, 1 1/4 cups (300 ml)
Dry white wine, 1/2 cup (120 ml)
Water, 1/2 cup (120 ml)
Granulated sugar, 1 tbsp (13 g)
Bay leaves, 3
Whole cloves, 4
Cinnamon stick, 1 piece about 1 inch (2.5 cm)
Black peppercorns, 8
Fine sea salt, 1 tsp (6 g)
For finishing and serving
Golden raisins, 1/3 cup (50 g)
Dry white wine for the raisins, 1/4 cup (60 ml)
Pine nuts, 1/4 cup (35 g)
Extra virgin olive oil, 2 tbsp (30 ml)
Soft white polenta, 4 to 6 portions
Flat leaf parsley leaves, a few
Preparation
Cleaning and Boning the Sardines
Scale the sardines under cold running water with your thumb, working from tail to head, then snap the head off and pull the guts out with it. Run a thumbnail along the belly, open the fish flat and lift the spine out from the tail end in one movement. Leave the two fillets joined along the back so each sardine stays a single butterflied piece. Rinse, pat both sides dry on absorbent paper, salt lightly and leave them there while the onions start.
Sweating the Onions Until Sweet and Pale
Warm the olive oil in a wide sauté pan over low heat, add the sliced onions and the teaspoon of salt and stir to coat. Cover and sweat for 25 to 30 minutes, stirring every five minutes. The salt pulls water out and the lid keeps it in, so the onions steam in their own liquid and take no colour. They should finish translucent, collapsed and sweet with no brown edges, since a caramelized note fights the vinegar instead of cushioning it. Soak the raisins in the wine meanwhile and toast the pine nuts dry for two minutes.
Spicing the Vinegar
Pour the vinegar, the rest of the wine and the water over the softened onions, then add the sugar, bay, cloves, cinnamon and peppercorns. Bring it to a bare simmer and hold it uncovered for 10 minutes, so the harshest volatile acid drives off and the spices bloom into the liquid. Taste it: sharply sour with the sweetness arriving a beat behind, never a syrup. Correct it now, because once the fish is in nothing can be adjusted, then cool it to room temperature with the spices still in it.
Flouring and Frying the Sardines
Heat the frying oil to 350°F (175°C) in a deep pan and check it with a thermometer, not by eye. Dredge each sardine in the flour and slap it against the side of the bowl so almost all of it falls away: you want a film, not a coating. Fry in batches of five or six for 60 to 90 seconds a side, until the surface is set, pale gold and dry to the touch. Lift them onto a rack rather than stacking them on paper, salt them straight out of the pan, and let the oil climb back to temperature before the next batch.
Layering the Terrine and Resting It Two Days
Let the sardines cool completely on the rack, 30 to 40 minutes, and make sure the onions are at room temperature too. In a glass or ceramic dish spread a thin bed of onions, lay the sardines over it in a single layer without overlapping, scatter half the drained raisins and half the pine nuts, then cover with more onions and their liquid. Repeat, finishing with onions so no fish is exposed, and pour the 2 tablespoons of olive oil over the surface to seal it. Cover and refrigerate 48 hours before touching it.
Plating
Take the dish out of the refrigerator 30 minutes before serving. Straight from the shelf the olive oil is cloudy and half the aroma is locked down; at cool room temperature the spices open and the vinegar reads rounder. Do not warm it further: heat turns the onions slack and the vinegar volatile.
Spoon soft white polenta onto one side of a shallow plate and let it settle into a loose pool, not a mound. Lift two or three sardines out whole with a flat spatula, drawing them sideways out of the layers so they stay intact, and lay them against the polenta under a spoonful of the onions. Add a few raisins, the reserved dry pine nuts for the crunch the marinated ones have lost, two parsley leaves and a thread of raw olive oil. No lemon at the table: there is already enough acid on the plate.
Professional Technique
Everything that decides whether this dish survives happens in the frying pan, before any vinegar touches the fish. The film of flour on a sardine is not there for crunch, since it softens within hours anyway. It is a barrier. In hot oil the starch granules on the surface swell, gelatinize and then dry into a continuous shell perhaps half a millimetre thick, and that shell stands between the flesh and the marinade for two days. It slows the acid to a crawl, which is why a Triestine savôr needs forty eight hours to season instead of a single afternoon, and it holds the two fillets of each butterflied fish together, so what comes out of the dish is still a whole sardine. It is also why the flour has to be slapped off: a thick jacket never dries through, turns to paste against the liquid and clouds the marinade grey.
The oil temperature is the other half of the same mechanism, and 350°F (175°C) is not approximate. At that heat the water on the surface flashes off violently enough to set the starch shell in 60 to 90 seconds, before the centre of a fish barely a finger thick overcooks. Drop the oil to 320°F (160°C) and the physics reverse: the surface never dries, the sardine absorbs oil instead of expelling steam, and the coating stays limp. A limp coating is not a lesser version of a crisp one but a different failure: it offers the vinegar no resistance, and the fish comes out on day two as flakes and slurry in a cloudy liquid. Fry five or six at a time and let the oil recover between batches, because eight cold sardines at once pull it below the threshold and all of them fry soft.
The third rule is a waiting rule, and impatience is what breaks it: the sardines and the onions must both be completely cold before they are layered. A sardine straight from the pan is close to 190°F (88°C) inside, and hot protein takes up acid far faster and far less evenly than cool protein. Layered hot, the vinegar drives to the bone in minutes instead of seeping in over two days, and the result is not seasoned fish but fish cooked a second time in acid: sour through to the centre, dry, stringy, the spices flattened into one note of vinegar. Thirty to forty minutes on a rack is all it costs, and the onions have to come down too.
Texture and Moisture Control
The fried surface is meant to change: it goes in dry and firm and comes out yielding, and that softening is the dish working rather than failing. What must not happen is the shell dissolving, and the only defences are a thin flour film, oil at temperature and cold layering. Underneath, the flesh should stay opaque and firm, never mushy at the edges.
Liquid management runs the rest. Two pounds of onions sweated under a lid release a great deal of water, which is why the vinegar is cut with wine and water rather than poured in neat: the marinade has to finish sharp but not caustic once the onion juices join it. The fish must stay submerged or sealed under onions, since anything exposed to air goes dull and grey, and the film of raw olive oil on top is that seal. Half the pine nuts go into the layers and soften there, half are held back dry for the plate, the only crunch the dish has left on day two.
Professional Mise en Place
The dish is finished two days before it is served, so nothing happens à la minute except lifting portions and spooning polenta. Work in one session: onions first, fish cleaned while they sweat, frying last, everything cooled before it is layered.
Equipment and tools
Deep heavy pan and a frying thermometer
Wide sauté pan with a lid for the onions
Cooling rack over a tray
Glass or ceramic dish, never metal, for layering and resting
Flat slotted spatula, to lift the sardines out whole
Prepared ahead
Sardines cleaned, boned and dried, up to 4 hours ahead
Onions sweated and vinegar simmered, cooled to room temperature
Raisins soaked in wine, pine nuts toasted and kept dry
The assembled dish, 48 hours minimum and up to 4 days ahead
Service setup
Dish out of the refrigerator 30 minutes before serving
White polenta cooked soft and held loose over a low bain marie
Reserved pine nuts, parsley and finishing oil within reach
Plates at room temperature, never warmed
Chef Tips
Buy the sardines the day you cook them and look at the eye and the gill, not the price. A sardine is one of the fastest fish in the market to go over, and two days in vinegar concentrates every fault. Ask the fishmonger to scale them but bone them yourself: a machine boned sardine arrives broken.
Use white wine vinegar of about 6 percent acidity and taste it before it goes near the pan. Supermarket vinegars vary more than the label suggests, and a harsh one buries the cloves and cinnamon however much sugar you add. If yours is aggressive, lengthen the water rather than sweetening it further.
Make twice as much as you think you need. It keeps for the better part of a week and is better on day three than on day two, once the spice has spread through the onions and the fish no longer tastes of frying oil.
To cook it the way the Karst taverns still do, replace the frying oil with lard: it sets the shell firmer and leaves a faint savoury depth under the vinegar. Keep the olive oil for the onions and the finish, where its flavour actually reaches the palate.
Common Mistakes
Frying in oil that is too cool. Below about 330°F (165°C) the flour never dries into a shell, the sardine absorbs oil instead of shedding steam, and the soft coating dissolves in the marinade and takes the fish apart with it. Use a thermometer and fry in small batches.
Layering the fish while it is still warm. Hot flesh takes up acid several times faster than cold, so the vinegar reaches the bone in minutes and the sardine turns sour, dry and stringy right through. Cool fish and onions alike to room temperature first.
Flouring the sardines too heavily. A thick coat cannot dry through, turns to paste against the liquid and slides off during the rest, leaving the marinade cloudy. Dredge, then slap most of the flour off before the fish goes into the oil.
Serving it the same day. At eight hours the vinegar has barely passed the flour shell and the dish tastes of two separate things, fried fish and sour onions. Forty eight hours is the minimum.
Resting it in a metal dish. Aluminium and unlined steel react with this much vinegar and pass a metallic edge into the fish over two days. Use glass, porcelain or glazed earthenware.
Wine Pairing
Collio Friulano DOC: The bottle this dish grew up beside, from the hills an hour inland. Friulano has a firm acidity that meets the vinegar head on instead of being erased by it, and the bitter almond note it finishes on echoes the pine nuts directly.
Ribolla Gialla Collio DOC: A choice about texture rather than acidity. Ribolla brings a waxy, almost chewy mouthfeel and a saline finish that reads as sea air, which sits naturally against Adriatic sardines. Where Friulano cuts, Ribolla coats.
Alto Adige Gewürztraminer DOC: The pairing that explains the dish. Its lift of rose, lychee and warm spice runs alongside the cloves and cinnamon rather than fighting them, and its dry but glycerol rich palate handles the raisins where a lean white would taste sour. Serve it at around 50°F (10°C).
Trento DOC: Metodo classico from the Dolomite valleys, and the answer to the frying. Fine persistent bubbles and a bracing mountain acidity scrub the oil off the palate between mouthfuls, while the bread and almond notes from the lees give it substance against the onions.
Refosco dal Peduncolo Rosso Friuli DOC: For anyone who wants red with fish, and locally this is what they drink. Refosco has high acidity, dark plum fruit and a tannin that stays fine rather than gripping, so it does not clash with the vinegar as a structured red would. Serve a young unoaked bottling cool, around 57°F (14°C).
Storage & Reheating
This is a preserve, so storage is the point of the recipe. Keep it covered in its glass or ceramic dish in the refrigerator, the fish always submerged or sealed under onions and the film of olive oil unbroken. It is ready at 48 hours, best between day two and day four, and good for up to 6 days.
There is no reheating. Warming a savôr drives off the aromatics, makes the vinegar harsh, turns the onions slack and wrecks what structure the fish has left. The only adjustment is upward, 30 minutes on the counter, which brings the olive oil clear and the spices back into the nose.
Do not freeze it: freezing ruptures the flesh of an already acidified fish and the sardines thaw as mush. The polenta is the only part that needs regenerating, so keep it refrigerated up to 3 days, then loosen it over low heat with a splash of water or milk, whisking until soft and pourable.
Nutrition
Per serving, based on 4 servings as a secondo, without the polenta:
Calories: 480 kcal
Total Fat: 27 g
Saturated Fat: 5 g
Trans Fat: 0 g
Unsaturated Fat: 21 g
Cholesterol: 95 mg
Sodium: 620 mg
Total Carbohydrates: 28 g
Fiber: 4 g
Total Sugars: 16 g
Added Sugars: 3 g
Protein: 34 g
Lactose: 0 g
Principal micronutrients: omega 3 fatty acids, vitamin B12, vitamin D, calcium, selenium, phosphorus, potassium
These figures are estimates. Most of the frying oil stays in the pan, and much of the salt and sugar remains in the marinade left behind in the dish.
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