Fish Au Gratin - cooking recipe

Ingredients

1 (16 oz.) pkg. frozen cod, haddock or flounder fillets
4 Tbsp. butter or margarine
1 green onion, thinly sliced
1/3 c. all-purpose flour
1/4 tsp. pepper
1 1/2 c. milk
1 (4 oz.) pkg. shredded sharp Cheddar cheese (1 c.)

Preparation

ABOUT 45 MINUTES BEFORE SERVING: Remove frozen fish fillets from freezer; let stand at room temperature 15 minutes to thaw slightly.