2 tbsp. butter
2 tbsp. flour
1/2 tsp. salt
1 c. milk
1/2 c. grated cheddar cheese
2 tsp. lemon juice
1 lb. haddock fillet (or lemon sole)
Bread crumbs

Preheat oven to 350 degrees. Place fish in greased 9x13 inch baking dish. Melt butter in a saucepan. Add flour and salt; stir until blended. Slowly add milk and bring to a boil, stirring constantly until the mixture thickens. Remove from heat; blend in cheese and lemon juice. Pour sauce over fish and sprinkle with bread crumbs. Bake for 30 minutes.