Pizza Casserole
["1 lb. ground beef", "1 medium onion, chopped", "1/2 tsp. salt", "1 qt. spaghetti sauce", "4 oz. elbow macaroni, cooked and drained", "8 oz. shredded Mozzarella cheese", "4 oz. pepperoni"]
["Brown beef and onion; drain fat.", "Add all remaining ingredients.", "Spoon into a greased 2-quart casserole dish.", "Bake at 350\u00b0 for 40 minutes."]
["ground beef", "onion", "salt", "spaghetti sauce", "elbow macaroni", "Mozzarella cheese", "pepperoni"]