Arrange six thin slices fat salt pork two and one-half inches square in a dripping-pan. Cover with one small onion, thinly sliced, and add a bit of bay leaf. Wipe a two-pound piece of chicken halibut and place over pork and onion. Mask with three tablespoons butter creamed and mixed with three tablespoons flour. Cover with three-fourths cup buttered cracker crumbs and arrange thin strips of fat salt pork over crumbs. Cover with buttered paper and bake fifty minutes in a moderate oven, removing paper during the last fifteen minutes of the cooking to brown crumbs. Remove to hot serving dish and garnish with slices of lemon cut in fancy shapes sprinkled with finely chopped parsley and paprika. Serve with White Sauce II, using fat in pan in place of butter.