BROILED HERRING WITH MUSTARD SAUCE

Clean and cut off the heads of the fish, but do not split. Dip in seasoned oil and let stand for an hour. Broil over a slow fire. Mix together one teaspoonful of flour and one tablespoonful of mustard. Add one cupful of white stock and bring to the boil. Add one tablespoonful of butter, a teaspoonful of minced parsley, and pepper and salt to taste. Pour over the fish and serve.