1 1/2 to 2 lbs. fish fillets
2 tbsp. butter
1 c. soft bread crumbs
1/2 c. shredded Cheddar cheese
1/4 c. mayonnaise
2 tbsp. prepared mustard
Salt and pepper to taste

Stir bread crumbs, cheese, mayonnaise and mustard in melted butter. Arrange fish in 9x12 inch baking dish. Spread crumb mixture on top of fish. Bake uncovered at 350 degrees for 20-30 minutes or until fish flakes easily.