1 lb. spaghetti cooked to pkg. directions
1 (16 oz.) can plain tomato sauce
1/2 lb. American cheese slices

Cook pasta. Drain. Pour tomato sauce over and mix in. Grease a 9 x 13 casserole dish lightly with butter. Layer 1/2 the spaghetti to cover dish bottom. Cover with American cheese slices. Pour remaining pasta over and layer with cheese again. Bake at 350 degrees for about 40 minutes until cheese is lightly brown and bubbly.