1 lb. hamburger
2 jars Prego (any flavor)
1 lg. pkg. manicoti shells
1 (8 oz.) pkg. Mozzarella cheese
1 (8 oz.) pkg. Cheddar cheese
1/2 c. Parmesan cheese
1 sm. onion

Preheat oven to 350 degrees. Brown hamburger with onion. Drain. Cook noodles as on package. Mix hamburger and one jar Prego, and all the cheese. Stuff shells, place in cake size pan. Top with other jar of Prego. Cook 45 minutes.