Fillet the fish and fry them in egg and bread crumbs; slice and fry the onion, lay this and the fish in a tin dish. Cover with stock, put in the cloves, peppercorns, and mace, cover over, and put into a moderate oven for an hour. Mix the flour and ketchup together and stir it in; put back into the oven for ten minutes. Dish the fish and strain the sauce over it.
Time: 1 1/4 hours.