1-1 1/2 lbs. ground beef
3 c. macaroni, uncooked
1 (29 oz.) can tomato sauce
2 tsp. oregano
1/2 c. chopped onion, if desired
Salt to taste
10 slices American cheese
1 (12 oz.) pkg. shredded Mozzarella cheese
Parmesan cheese

Cook macaroni as directed on package. Brown ground beef and onion in skillet; drain. Mix together macaroni, beef, onions, tomato sauce, oregano, and salt. Mix thoroughly. Pour half of the mixture into a 13 x 9 x 2 inch baking pan.

Lay the American cheese slices on top of the mixture. Pour the remaining mixture on top of the cheese. Spread the shredded Mozzarella cheese on top, then sprinkle on Parmesan cheese. Bake at 350 degrees for 20 minutes or until cheese is melted.