STRIPED BASS À LA MARSEILLES

Clean a large striped bass and divide into fillets. Put into a fish-boiler with three tablespoonfuls of butter, two large onions, sliced, a bunch of parsley, a bay-leaf, salt and pepper to season, and red wine and water, in equal parts, to cover. Simmer for an hour, drain the fish, take out the parsley, strain the liquid, and spread the cooked onions over the fish. Cook three tablespoonfuls of flour in two tablespoonfuls of butter, add the strained liquid and cook until thick, stirring constantly. Take from the fire, add the juice of a small lemon, a tablespoonful of anchovy essence, and two tablespoonfuls of butter. When the butter is melted, pour over the fish and serve.