Baked Fish Fillet Supreme

6 fillets whitefish
salt and pepper
6 slices of tomato
6 slices of cheese
1 ounce butter
1 ounce flour
1/2 pint milk
1 tin of mushrooms
2 small onions, chopped
2 tablespoons sherry
parsley, chopped
3 cups cooked rice

Prepare the fillets, removing the skin and small bones.

Season with salt and pepper. Roll up, with the outside of the fish on the inside.

Arrange the fish, tomatoes and cheese alternately down the center of a shallow Pyrex casserole dish. Set aside.

Melt margarine in a pan, then stir in flour and salt. Add milk a little at a time, then mushrooms, onions and sherry. Stir constantly until the mixture boils. Pour over the fish.

Bake in 350F oven for 20 minutes until fish is cooked. Garnish with chopped parsley and serve hot with rice.