Marmite Dieppoise

Prepare the seafood. Check the fish for pin bones, keep all seafood chilled, scrub the mussels, cut the fish and prepare the vegetables. Use Cold tray, tweezers, knife and board. Time: 25 minutes. Temperature or condition: cold. Even pieces allow staggered cooking without overcooking delicate species. Use separate clean utensils for raw seafood and wash hands after handling. Fish portions are evenly sized, no obvious bones or shell fragments remain, and the seafood stays cold.

Measure the sauce base. Measure the cider, stock, cream, butter, flour, salt and pepper so the sauce can be finished without leaving seafood at room temperature. Use Measuring jug and small bowls. Time: 10 minutes. Temperature or condition: cold. Mise en place shortens warm holding of seafood. Return cream and unused seafood to refrigeration promptly. All sauce ingredients are measured and the cream remains refrigerated until needed.

Open the mussels. Steam the mussels with 100 ml of the cider in a covered wide pot, shaking once, until the shells open; remove opened mussels promptly, discard any unopened ones and strain 120 ml cooking liquor through a fine sieve. Use Wide lidded pot and fine sieve. Heat: medium-high. Time: 5 minutes. Temperature or condition: steam. Cooking mussels separately controls shell debris and preserves their liquor. Discard mussels that do not open during cooking. The mussel shells are open; unopened mussels are discarded, and the reserved liquor is free of grit.

Reduce the broth. Sweat the shallot, leek and carrot in the butter, stir in the flour, then add the remaining cider, fish stock and strained mussel liquor and reduce to about 600 ml. Use Heavy saucepan. Heat: medium. Time: 15 minutes. Temperature or condition: gentle boil. Reduction concentrates the seafood liquor and cooks out the raw flour taste. Steam can burn; stir from the side and keep the pan stable. The vegetables are tender and the liquid has reduced noticeably to a light sauce base without scorching.

Poach the firm fish. Add monkfish and hake first and poach gently. Use Heavy saucepan. Heat: gentle simmer. Time: 8 minutes. Temperature or condition: 63 °C target. Firm fish needs a head start before sole and shellfish. Verify 63 °C in representative thick fish pieces. The thickest monkfish and hake pieces reach 63 °C and flake under gentle pressure without breaking apart.

Add delicate seafood. Add sole and scallops and continue gently until the scallops and fish reach the safe endpoint; return the mussel meat and shrimp only at the end to heat through. Use Heavy saucepan. Heat: gentle simmer. Time: 7 minutes. Temperature or condition: 63 °C target. Staggering protects delicate seafood from prolonged heat. Check for shell fragments while returning mussel meat. Sole and scallops reach 63 °C, scallops are opaque and firm, and reheated mussels and shrimp are hot without becoming rubbery.

Finish with cream. Lower the heat, stir in the cream, season with the measured salt and pepper and reduce only enough to finish at about 750 ml sauce. Use Heavy saucepan. Heat: low. Time: 5 minutes. Temperature or condition: below vigorous boil. Cream rounds the broth without turning it into a thick chowder. Do not leave the finished seafood stew at room temperature; serve promptly. The sauce lightly coats a spoon yet remains fluid enough to pool around the seafood, with about 750 ml total sauce.