Filets de Soles Judic

Ingredients

Equipment Needed

• •Food processor, preferably with a small bowl
• •Fine-mesh sieve and flexible spatula
• •12-inch (30 cm) covered ovenproof sauté pan
• •Wide shallow pan for poaching the Mousselines
• •Small heavy saucepan for the Mornay
• •14-inch (35 cm) broiler-safe oval gratin dish
• •Two tablespoons for shaping
• •Instant-read thermometer

Instructions

1. 1

   Make the mousseline

   Chill the food-processor bowl and blade for 15 minutes. Pat the diced sole dry, then process it with ½ teaspoon of the salt and ⅛ teaspoon of the white pepper until smooth and sticky. Reserve 1 teaspoon of the egg white and 1 tablespoon of the cream. Add the remaining egg white, then 7 tablespoons (105 ml / 105 g) of the cream in four small additions, pulsing only until each disappears. Push the paste through a fine sieve into a bowl set over ice. Sole mousseline is an emulsion, so cold is its grammar. If it turns shiny and loose, stop adding cream, chill it over ice for 10 minutes, then pulse in the reserved egg white. Ça se rattrape.

2. 2

   Test and shape

   Bring a small quantity of the measured water to a bare tremble. Poach a teaspoon of mousseline for 2 minutes, taste it, and check its texture. If it is firm and rubbery, work in the reserved cream a teaspoon at a time; if it feathers apart, chill the mixture again and add the reserved egg white if you have not already used it. Adjust the salt only after this test, because cold raw forcemeat conceals its seasoning. Lightly butter a parchment-lined tray, then use two wet tablespoons to shape eight flattened ovals about 2½ inches (6 cm) long. These are Mousselines, small individual portions sized for one serving. Cover and keep them cold.

3. 3

   Reduce the glaze

   Pour the unsalted brown veal or beef stock into a small saucepan and boil steadily until only 3 tablespoons (45 ml / about 50 g) remain, about 20 to 30 minutes. It should look dark and syrupy and cling to a cold spoon without running straight off. This reduction is the home equivalent of the meat glaze once drawn from a permanent stockpot. Set it aside without salting it. If it tightens into a paste while waiting, loosen it with a teaspoon of water; the butter goes in only after the dish leaves the broiler.

4. 4

   Braise the lettuces

   Heat the oven to 350°F (180°C). Melt 2 tablespoons (30 ml / 28 g) of the butter in a covered ovenproof sauté pan. Set the lettuce halves cut-side down and cook for 2 minutes, just until glossy, without giving them a hard brown crust. Turn them, season with ¼ teaspoon of salt and a pinch of white pepper, then add the chicken stock. Cover closely and braise in the oven for 18 to 22 minutes, until a knife slips through the core with little resistance. Drain the halves cut-side down for 5 minutes, trim only the tough nub of core, and tuck any loose leaves underneath. Keep them covered and warm. The lettuce must be tender but still shaped well enough to carry a fillet.

5. 5

   Build the Mornay

   Melt 2 tablespoons (30 ml / 28 g) of butter in a saucepan, stir in the flour, and cook for 90 seconds without colouring it. Gradually whisk in 1 cup (240 ml / 247 g) of the milk, then add 3 tablespoons (45 ml / 45 g) of the cream. Simmer gently for 4 minutes, whisking, until the béchamel coats the back of a spoon. Take it off the heat and stir in the Gruyère, Parmesan, nutmeg, ⅛ teaspoon white pepper, and salt as needed. This is Mornay, the cheese-enriched béchamel that supplies both coating and colour. If it is too thick, loosen it with the reserved milk; if the cheese becomes oily, remove the pan from all heat and whisk in the remaining tablespoon of cold cream. Ça se rattrape. Cover the surface directly and hold the sauce warm, never boiling.

6. 6

   Stage the finish

   Lower the oven to 325°F (165°C). Lightly butter a large broiler-safe oval gratin dish and arrange the eight lettuce halves around it, cut-side up, leaving the centre open. Warm the dish in the oven for 5 minutes, then cover it. Bring the remaining water to 175 to 180°F (80 to 82°C), no more than a bare tremble, in a wide pan. Set the warm Mornay and reduced glaze beside the stove. This mise en place is not ceremony; once the sole is cooked, the dish must move without waiting.

7. 7

   Poach the sole

   Wipe the covered sauté pan dry and melt 4 tablespoons (60 ml / 56 g) of butter in it. Season the sole fillets with ½ teaspoon salt and the remaining white pepper. Fold each fillet in half with its former skin side inward, tucking the thin tail underneath so the packet has an even thickness. Arrange them in one layer, spoon over the lemon juice and melted butter, then cover closely with buttered parchment and the lid. Poach in the 325°F (165°C) oven for 6 to 9 minutes, until the flesh is nearly opaque and reaches 135 to 140°F (57 to 60°C); the final glaze will carry it to 145°F (63°C). If a fillet unfolds, secure it briefly with a wooden pick and remove the pick before plating. Lift each folded fillet onto one lettuce half, then turn the broiler to high.

8. 8

   Poach the Mousselines

   Slide the chilled Mousselines into the barely trembling water and poach for 4 to 6 minutes, turning them once, until they feel lightly springy and reach 145°F (63°C) at the centre. Never let the water boil. A boil roughens the surface and tightens the delicate forcemeat; if it begins, pull the pan off the heat until the water settles, then continue more gently. Drain the Mousselines on a clean cloth and place one flattened oval on each sole fillet.

9. 9

   Assemble and glaze

   Spoon the warm Mornay over each fillet and Mousseline, coating them generously while leaving a little green lettuce visible beneath. Set the dish about 5 inches (13 cm) below the fully heated broiler and glaze for 1 to 3 minutes, only until the sauce shows amber freckles and a bubbling edge. If colour comes slowly, stop after 3 minutes; a pale glossy sauce is preferable to dry sole. Rewarm the reduced meat glaze, whisk in the final tablespoon (15 ml / 14 g) of butter, and use a teaspoon to trail a fine thread around the oval of fillets as soon as the dish leaves the oven. Check that the sole has reached 145°F (63°C), then serve at once. À table!

Chef Tips

• •True Dover sole gives the finest, firmest fillets, but lemon sole or a delicate firm-fleshed flounder can carry the method honestly. Ask for evenly sized skinless fillets and enough extra fish for the mousseline; uneven pieces finish at different moments, which is troublesome in a dish built on timing.
• •Little Gem lettuce is the honest home equivalent for the larger heads once blanched, tied, and trimmed by a brigade. Its compact core survives braising and gives each sole fillet a neat, sweet base without string, needles, or unnecessary handling.
• •Keep the fish, cream, bowl, and blade properly cold while making the mousseline. Warm forcemeat loses its emulsion and becomes grainy; cold ingredients give a tender quenelle that holds together without flour.
• •Use unsalted stock for the meat glaze. Veal stock gives the gentlest result, while beef stock makes a darker, stronger thread and should be applied sparingly. This is an accent around the fish, not a moat beneath it.
• •A lean Chablis or restrained white Burgundy has enough acidity for the Mornay and enough body for the sole. Pour before the final assembly, because once the dish is glazed, everyone should already be sitting down.

Advance Preparation

• •The sole mousseline can be mixed, tested, shaped, and chilled up to 4 hours ahead. Keep the tray covered and properly cold, then poach the Mousselines only during the final assembly.
• •The lettuces can be braised up to 6 hours ahead. Cover and chill them in a little of their braising liquid, then drain and warm them gently before arranging the sole.
• •The meat glaze can be reduced a day ahead and chilled. Rewarm it gently and whisk in the butter only after the glazed fish leaves the broiler.
• •The Mornay can wait for about 2 hours with parchment pressed against its surface. Reheat it over the gentlest heat and loosen it with reserved milk if it has tightened.
• •Do not assemble the complete dish in advance. The final broiling is meant to colour food that is already hot; using it to reheat cold components overcooks the sole before the Mornay glazes.

Frequently Asked Questions

Nutrition Information

1 serving (about 500g)