Defrost fillets enough to separate. Put fillets in a 9 x 9 pan greased with butter or margarine. Sprinkle chives and seasonings, amount depends on your personal taste. Place slices of butter or margarine on top of fillets and pour milk around them, but not over them. Cover tight, (use foil for top). Bake in 325ºF. for 1 hour. Do not pre heat oven. Serves 3 - 4