Season and slice red fish; roll in flour and fry until brown. Then heat 1 tablespoonful of butter; add 1 chopped onion and 1 cup of tomatoes; let fry; add 1 tablespoonful of flour and 1 cup of water; also some parsley, salt, pepper and 1 bay-leaf chopped fine. Let all cook; then add the slices of fried fish. Let all get very hot and serve with boiled rice.