Score and scale two pounds of blue-fish; place it in a buttered pan, with half a glassful of white wine, three tablespoonfuls of mushroom liquor. half of a very finely chopped onion, and six chopped-up mushrooms. Season with a pinch of salt and half a pinch of pepper. Cover the fish with a buttered paper, and cook in a moderate oven for fifteen minutes; take the fish out, lay it on a serving dish, and put the juice in a stewpan, adding a gill of Espagnole sauce (No. 151), with a small glassful of white wine; reduce for two minutes, then pour it over the fish, with one pinch of finely chopped parsley, and serve with six heart-shaped pieces of crouton (No. 133).