Merlan à la Colbert

Merlan à la Colbert (back-opened, boned whiting fried in a crumb coat and filled with maître d'hôtel parsley-lemon butter) teaches one clean principle: the crust must seize in hot fat before this delicate fish can surrender its juices. That is what pané à l'anglaise, coated in egg and crumbs, is doing. It is armor, not decoration.

The original entry assumed a fish cook who could open and bone a tray of whitings, an Anglaise (for Egg-and-bread-crumbing) (No. 174) always waiting, and a deep-fat range large enough to send them out together. A saucier, a stock never off the fire, and a salamander were brigade fixtures, but none is needed here. Your honest equivalents are a fishmonger willing to do the dorsal boning, a wide heavy pot, a thermometer, and a low oven that holds each fish while the others fry. The standing breading station and brigade quantity are scaffolding and can go; the dorsal opening, the milk and flour before Anglaise, the very hot fat, and the maître d'hôtel butter are the dish and must stay. One cook, one stove, one evening.

The reward is a whole fish under a deep golden crust, its back opened to receive cold green-flecked butter that immediately slips between the hot flakes. Serve it without delay. Before you touch the pot, remember the step that decides everything: the oil must return to 180°C before each fish goes in.