Clean a tilapia and cover it with salted cold water and vinegar. Soak for an hour, then drain and dry. Stuff with seasoned bread crumbs, sew up, and put into a deep baking-pan. Brush with beaten egg, sprinkle with bread crumbs and dot with butter. Add two sliced onions, a cupful each of sweet wine and stock. Sprinkle some parsley over the fish. Bake for an hour, basting as needed. Take out the fish, strain the
liquor, thicken with a tablespoonful of butter and a tablespoonful flour, and season with salt, pepper, lemon-juice, and a pinch of sugar.
"I Love Cooking, and All Things Fish"