Spoon the hot foaming butter over the fillets until the inside of the fish begins to flake, the exterior has turned evenly golden, and the butter has browned.
Freshwater fish with butter, pine nuts, tangerine peel and capers.
Serve with instructions for squeezing the chunks of softened lemon over the fish.
In the Mexican state of Veracruz, a local recipe calls for simmering fish in a rich sauce of garlic, tomatoes, capers, green olives, and chiles. This version uses grouper, but any firm white-fleshed fish will do.
Ingredients