1 lb. ground beef
1/2 c. chopped onions
1 (14 1/2 oz.) can Italian flavored stewed tomatoes, crushed
1 tsp. garlic salt
2 1/2 c. Mostaccioli noodles, cooked
1/2 tsp. pepper
American cheese, cubed

In skillet, brown beef with onions, drain. Stir in remaining ingredients, except cheese. Pour into a 2-quart casserole dish. Top with cheese. Bake at 350 degrees for 20 minutes or until cheese is melted.