Italian Stuffed Onions with Sausage and Turin Breadsticks | Cipolle Ripiene con Salsiccia, Toma e Grissini Torinesi
A stuffed onion is not a vegetable with something on top of it. It is a container built out of the vegetable itself, and what goes wrong goes wrong at the base. The onion is hollowed out while it stays whole, two or three outer layers are left standing as the wall, and the small firm disc at the root end is left completely untouched, because that disc is the plug. It is the only thing holding the sausage, the melting Toma and the juices inside the onion through fifty minutes of baking. Break through it with a spoon and all of that drains into the dish.
The filling is Piedmontese: fresh pork sausage, young Toma Piemontese and crushed Grissini Torinesi, moistened with milk and bound with one egg, baked with white wine under a crumb that colours in the last twenty minutes. It starts with the onion flesh you scooped out, cooked down in butter until sweet, so nothing is thrown away.
Nothing here is difficult. The dish asks for patience with a teaspoon and a baking dish small enough to keep four onions standing upright.
Yield: 4 servings, one onion each. Prep: 45 minutes. Cook: 55 minutes. Rest: 10 minutes. Total: about 1 hour 50 minutes. Difficulty: intermediate. Course: secondo or a substantial antipasto. Region: Piedmont.
The Story
Cipolle ripiene belong to the Piedmontese antipasto table, the procession of small plates that opens a Sunday lunch in the Langhe and the Monferrato and that once ran to a dozen dishes before anything hot arrived. The stuffed onion was never a centrepiece there. It sat among the peppers, the tomini and the acciughe al verde, one per person, and it was one of the few dishes on that table that could be made in the morning and be better by one o'clock.
The onion itself is why the dish exists in Piedmont rather than elsewhere. The plains around Novara grow the bionda di Cureggio e Fontaneto, a flattened golden onion with thick fleshy layers and a Slow Food presidium behind it, and the Canavese around Ivrea has grown large sweet onions for market for centuries. Both are the right shape for hollowing: wide, squat, with layers substantial enough to stand as a wall once the centre is out. A tall thin onion sold in nets will not.
The filling records what a Piedmontese kitchen had in the house. The sausage came from the winter pig. Toma Piemontese came down from the alpine valleys where it has been made since the twelfth century and is now a DOP, semi soft and gently lactic when young, the cheese that melts rather than browns. The grissini are pure Turin, invented in the city in the seventeenth century for a sickly young Vittorio Amedeo II, and a crushed handful does duty for breadcrumbs exactly as it always has once they go soft in the jar.
Ingredients
For the onions
Large yellow onions, wide and flat, about 9 oz (250 g) each, 4
Water, 4 quarts (3.8 l)
Coarse sea salt, 2 tbsp (36 g)
For the filling
Fresh Italian pork sausage, casing removed, 10 oz (285 g)
Scooped onion flesh, chopped, about 1 1/2 cups (250 g)
Unsalted butter, 1 1/2 tbsp (21 g)
Dry white wine, 1/4 cup (60 ml)
Grissini Torinesi, crushed fine, 2 oz (55 g)
Whole milk, 3 tbsp (45 ml)
Egg, large, 1
Young Toma Piemontese DOP, rind off, small dice, 3 1/2 oz (100 g)
Grana Padano, finely grated, 1 oz (30 g)
Fresh marjoram leaves, chopped, 1 tsp (1 g)
Freshly grated nutmeg, 1 pinch
Fine sea salt, 1/4 tsp (1.5 g), plus more for the cavities
Freshly ground black pepper, to taste
For the baking dish
Extra virgin olive oil, 2 tbsp (30 ml)
Dry white wine, 1/3 cup (80 ml)
Light meat stock or water, 1/3 cup (80 ml)
Bay leaf, 1
For finishing
Grissini Torinesi, crushed coarse, 1 oz (30 g)
Grana Padano, finely grated, 1/2 oz (15 g)
Unsalted butter, melted, 1 tbsp (14 g)
Extra virgin olive oil, a few drops
Fresh marjoram leaves, small, 8
Preparation
Step 1
Peel the onions and open them at the top. Take off the papery skin and the tough layer under it, keeping the onion whole, then cut the lid off the stem end, the upper fifth. This is the decision the dish rests on. The opening goes at the top, never at the root: leave the base as it is, basal disc and dry hairs attached, and do not level it for a flat seat.
Step 2
Blanch the onions whole in salted water. Bring the water and coarse salt to a rolling boil and cook the onions root end down for 7 to 9 minutes. You want walls that bend under a thumb without tearing and a knife tip that still meets resistance: an onion cooked soft now will not hold a filling later. Cool them under running water, then stand them open side down on a rack for 10 minutes.
Step 3
Hollow each onion from the top down. With a teaspoon or small melon baller, go in through the opening and lift the inner layers out one at a time rather than digging. Leave two or three outer layers as the wall, a good 1/4 inch (6 mm) thick, and stop about 1/2 inch (12 mm) above the base. Hold each onion to the light: if you can see through the floor, that one becomes filling. Chop the scooped flesh and keep it.
Step 4
Cook the scooped flesh into a base. Melt the butter in a wide saute pan over medium low heat, add the chopped flesh with a pinch of salt and cook 10 to 12 minutes, stirring, until soft and pale gold at the edges. Add the white wine and let it evaporate fully, then spread the mixture thin on a plate to cool. This is the sweetness in the filling, and the reason the centre never goes in the bin.
Step 5
Brown the sausage. Wipe the pan, set it over medium high heat and crumble in the sausage in loose pieces. Leave it still for two minutes so the underside takes colour, then break it up and cook through, 6 to 8 minutes. Lift it into a bowl with a slotted spoon, keeping a tablespoon of the fat and leaving the rest. Cool it to just warm before the cheese goes near it.
Step 6
Assemble the filling. Soak the finely crushed grissini in the milk for 5 minutes, until they swell into a soft paste. Combine the cooled onion base, the sausage, the grissini, the Toma, the Grana Padano, the marjoram, the nutmeg, the egg, the fine salt and plenty of black pepper. Fold rather than beat and stop as soon as it is even. Fry half a teaspoon and taste it for salt.
Step 7
Fill the onions and stand them up. Season each cavity with a pinch of fine salt. Spoon the filling in three additions, pressing only lightly, and finish with a low dome above the rim. Do not pack it hard: it needs room to expand. Oil a baking dish just large enough for the four onions touching, so they prop one another upright, pour the wine and stock around them, never over them, and add the bay leaf.
Step 8
Bake, crust and rest. Cover with foil and bake at 375°F (190°C) for 30 minutes. Uncover, scatter the coarse grissini and the Grana Padano over the tops, drizzle with the melted butter and return the dish for 20 to 25 minutes, basting the walls once, until the crust is deep gold and a skewer slides through a wall unresisted. Rest them in the dish 10 minutes before moving them.
Plating
Serve one onion per person on a warm plate, not a hot one, and lift it with two spoons rather than a spatula, one under the base and one steadying the wall. The base is still the weakest point after baking, and one spoon pressed against a side is what tips an onion over.
Set the onion slightly off centre and spoon two tablespoons of the pan liquid around it, tilting the dish for the part that has thickened with butter and cheese. Reduce it for a minute if it looks thin. Add a few drops of good olive oil to the liquid, not to the crust, which stays dry. Finish with two small marjoram leaves at the base and a turn of black pepper. Buttered spinach or a few roast potatoes beside it make it a full secondo.
Professional Technique
The governing technique is the intact basal disc. At the root end of every onion sits a compressed woody plate from which all the layers grow, the only genuinely watertight part of the bulb. Everything above it is concentric sheets with the stem channel running up the middle, so an onion opened at the bottom, or one whose floor a spoon has thinned to a translucent sheet, is a funnel. Keep that disc whole with half an inch of flesh above it and you have a closed vessel that holds the sausage fat, the melting cheese and the juices the walls release for the full hour. That retained liquid cooks the filling from inside and becomes the sauce on the plate.
Hollowing correctly means working from the top down and lifting rather than scraping. Slide the spoon between two layers and lever the inner cylinder out in pieces, going deeper, and let the outer layers tell you when to stop. Two or three of them at about 1/4 inch (6 mm) is the right wall: thick enough to survive an hour in the oven, thin enough to eat. Scraping is how cooks thin the floor without noticing, because the spoon cuts across the layers instead of following them.
Standing the onions upright is the third element, and it is a dish problem rather than a cooking one. As the walls soften the onion loses rigidity and begins to lean, and one that leans far enough pours its own filling out. Use a dish that holds all four with their sides touching so they brace each other, or set each one in a buttered muffin tin if you are cooking two. Liquid goes around them no deeper than half an inch: enough to steam and build a sauce, never enough to float them.
Texture and Moisture Control
Three textures have to arrive at once: a wall that yields to a fork without collapsing, a filling moist and open rather than dense, and a crust that still cracks. The wall is controlled by the blanching time, which stops short of tender, and by covering the dish for the first 30 minutes so the onion cooks in steam rather than drying in radiant heat. The filling is controlled by the milk soaked grissini, which hold the rendered sausage fat in the crumb instead of letting it run to the bottom. The crust is controlled by timing: it goes on when the foil comes off, then 20 to 25 minutes of dry heat.
The rest is not optional. Straight from the oven the filling is loose, because the egg has set but the cheese has not firmed up, and an onion lifted then splits along one side. Ten minutes in the dish brings the Toma back from liquid to soft and the onion comes out whole.
Professional Mise en Place
Equipment and tools
Wide deep pot for blanching, and a cooling rack
Teaspoon or small melon baller, and a paring knife
Wide saute pan for the base and the sausage
Baking dish just large enough for four onions touching, and foil
Two spoons for lifting the baked onions
Prepared ahead
Onions peeled, topped, blanched and hollowed, 1 day ahead, covered and refrigerated
Onion base cooked and cooled, up to 2 days ahead
Sausage browned and cooled, 1 day ahead, kept away from the cheese
Grissini crushed for filling and crust, kept dry in a sealed jar
Onions filled and standing in the oiled dish, 6 hours ahead, refrigerated
Service setup
Filled onions out of the refrigerator 30 minutes before baking
Crust mixture and melted butter ready for when the foil comes off
Pan liquid held warm, reduced if it is thin
Plates warm, never hot, marjoram picked into small leaves
Chef Tips
Buy six onions to stuff four. One will have a soft heart or a wall that tears while you hollow it, and the spares let you keep the best looking ones for the plate. The rejects go into the filling with the scooped flesh.
Salt the cavities, not the filling, and taste before you commit. Sausage, Toma and Grana Padano already carry plenty of salt, and the filling is the one thing you cannot correct once it is inside the onion.
Use Toma Piemontese young enough to still smell of milk. An aged Toma has lost the moisture that lets it melt and separates into oil and grain instead. A young Raschera or a semi soft tomino behaves the same way. A hard grating cheese does not.
If the crust is pale but the onions are done, give the dish 60 to 90 seconds under the broiler and stand in front of it. Crushed grissini are bread baked twice already and go from gold to black faster than breadcrumbs.
Common Mistakes
Cutting the onion open at the root end. The base is the only watertight part of the bulb, and opening it makes a funnel. The lid comes off the stem end, and the root is left alone.
Scooping through the floor. Stop about 1/2 inch (12 mm) above the base and hold the onion to the light before filling it. A floor you can see through empties into the dish.
Blanching the onions until tender. A soft wall cannot support a filling for another 55 minutes. Pull them out at 7 to 9 minutes, while a knife tip still meets resistance.
Packing the filling down hard. Compressed filling bakes into a dense plug with no steam inside. Add it in three loose additions and let it dome above the rim.
Baking in a dish that is too large. Onions standing apart have nothing to lean on and tip as the walls soften. Use a dish that holds them touching, or ramekins.
Moving the onions straight out of the oven. The cheese is still liquid and the wall splits under a spatula. Give them 10 minutes, then lift with two spoons.
Wine Pairing
Erbaluce di Caluso DOCG: The most local bottle here, grown in the Canavese a few miles from the onion fields around Ivrea. Its very high acidity and lean stony body cut through the sausage fat and the melted Toma without adding weight, and its green almond bitterness picks up the sweetness the onion develops in the oven.
Roero Arneis DOCG: Rounder and softer than Erbaluce, with white pear and a chalky finish, and the better choice when the onions come to the table as an antipasto. It has the body to sit alongside the cheese and a gentle herbal note that runs into the marjoram.
Dolcetto d'Alba DOC: The traditional pour for antipasti in the Langhe. Deep coloured but low in acidity with fine soft tannin, it wraps around the pork without stripping the lactic sweetness of the young Toma. Serve it at around 59°F (15°C), cooler than a Barbera.
Barbera d'Asti DOCG: The choice when the dish is eaten as a secondo with potatoes beside it. Barbera has almost no tannin and a great deal of acidity, exactly what a fatty sausage filling asks for, and its dark cherry fruit meets the browned crust.
Ghemme DOCG: Nebbiolo from the Novara hills, the same country as the bionda di Cureggio onion, and the most serious pairing here. Its firm tannin and dried rose and tar aromatics need the richest version of the dish, so keep it for a well seasoned sausage and a bottle with age.
Storage & Reheating
Baked stuffed onions keep refrigerated for 3 days in an airtight container, with the pan liquid in a separate jar so the crust does not sit in it. They are better on the second day, once sausage and onion have exchanged flavours, which is why the antipasto table treats them as a morning job.
Reheat them covered at 325°F (165°C) for 15 to 18 minutes with a spoonful of the reserved liquid in the dish, then uncover for 5 minutes to bring the crust back. A microwave turns the wall slack and the crust to paste. Unbaked filled onions freeze for 2 months, wrapped individually: bake from frozen, covered, adding 20 minutes to the covered stage. Do not freeze them after baking, since the wall goes watery on thawing.
Nutrition
Per serving, based on 4 servings of one stuffed onion each:
Calories: 560 kcal
Total Fat: 36 g
Saturated Fat: 16 g
Trans Fat: 0.4 g
Unsaturated Fat: 18 g
Cholesterol: 130 mg
Sodium: 890 mg
Total Carbohydrates: 32 g
Fiber: 4 g
Total Sugars: 12 g
Added Sugars: 0 g
Protein: 26 g
Lactose: 2 g
Principal micronutrients: calcium, phosphorus, vitamin B12, zinc, selenium, potassium, vitamin C
These figures are estimates. Most of the blanching salt goes out with the water, and the final sodium depends on how the sausage was seasoned.
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