Flounder Au Gratin

1 tb Margarine

4 Green Onons Cut Into 1/2

Inch Pieces 2 tb Diced Celery

2 ts Flour

1/8 ts Salt

1/8 ts White Pepper

1/2 c Skim Milk

1/4 c (1 Oz.) Shredded Swiss

Cheese 1 (16 Oz.) Package Frozen

Flounder, Thawed & Drained 1 tb Minced Fresh Parsley

Melt Margarine in A Small Saucepan Over Low Heat. Add Onions & Celery; Saute Until Tender. Stir in Flour, Sat & Pepper; Cook 1 Min. Stirring Constantly. Gradually Add Milk; Stir Well. Cook Over Medium Heat Until Thickened & Bubbly, Stirring Constantly. Add Shredded Swiss Cheese; Reduce Heat & Cook Until Cheese Melts, Stirring Constantly. Set Aside. Arrange Fillets in A Single Layer in A 10 X 6 X 2 Inch Baking Dish Coated With Cooking Spray. Pour Cheese Mixture Evenly Over Fillets. Cover & Bake At 350 For 25 Min. OR Until Fillets Flake Easily When Tested With A Fork. Sprinkle With Parsley. Fat 6. Cho. 64.