Cod à la Maître d'Hôtel

Ingredients

• 2 slices cod
• 115 g butter
• shallot
• parsley
• pepper
• 1/4 tsp nutmeg, grated
• 1/4 lemon lemon juice

Method

Poach the cod fillets gently in salted water at 65–70°C until the flesh turns opaque and flakes cleanly from the bone — about 8–10 minutes depending on thickness. A poaching approach at this low temperature keeps the protein strands tight and the flesh tender rather than the fibrous disintegration that comes from a rolling boil. Once cooked, lift the cod onto a warm plate, flake away the skin and any bones, and set aside.

Dice the shallot finely and soften it in a heavy-bottomed pan over moderate heat in 30 g of the butter — roughly 4 minutes, until translucent and sweet. This base is crucial: raw shallot in a delicate butter-sauce will bite. Add the remaining butter in small pieces, stirring constantly. This staged addition prevents the emulsion from breaking. The finishing-sauce should take on a pale, creamy colour as the fat suspends evenly in the water phase. If the mixture begins to separate into greasy puddles, drop the heat immediately and add a teaspoon of cold water while whisking — the water re-emulsifies the lipids. Add the grated nutmeg and a pinch of pepper. Taste and season with salt if needed.

Fold in the cooked cod gently to avoid breaking the flakes, then add the chopped parsley and the lemon juice. The acid is essential here: it brightens the richness of the butter and cuts through the density of the fish, preventing the dish from becoming cloying. A quarter lemon is conservative — judge by eye and taste. The sauce should be glossy and coat the back of a spoon without collecting in a pool at the plate's rim.

Serve immediately on warm plates. Butter sauces cool quickly and lose their gloss and emulsion as they sit. The moment between pan and plate is where this dish lives.