Turbotin Soufflé à la Reynière

Turbotin Soufflé à la Reynière (whole young turbot filled with a swelling fish mousseline, a light cream-bound forcemeat) teaches the difficult grace of rebuilding a fish without losing its shape. One true thing decides it: the mousseline must remain cold. Keep the emulsion cold and it swells tenderly inside the fish; let it warm and the cream escapes, leaving the filling coarse.

The original kitchen assumed a poissonnier to bone the turbot, a saucier keeping Soubise cullis and white-wine sauce ready, and a stockpot of fumet, the concentrated fish stock, never off the fire. It needed no salamander because the fish is meant to emerge pale and gently set, not browned. At home, the fishmonger removes the spine, a chilled food processor replaces the mortar, and two small saucepans do the work in sequence. One cook, one stove, one evening.

Only the inaccessible garnish changes. Use fish milt when a trusted fishmonger can supply it; otherwise, poached scallop medallions give the same pale tenderness, though their flavor is sweeter. The elaborate mushroom grooving becomes a few shallow fan cuts. Those details are brigade scaffolding. The cold mousseline, whole-fish closure, 2:1 fumet-to-mushroom-liquor poach, and 2:1 white-wine-to-Soubise sauce are the dish, and they stay.

Before the knife touches the turbot, chill the processor bowl, blade, fish, egg white, and cream. The cold mousseline is the step that decides everything.