Cheeseburger Macaroni

This is a new-to-me recipe that I found in an old issue of Southern Living.  The only thing I changed from the original recipe was to add an extra 1/4 C. ketchup.  Otherwise, this one's definitely a keeper and will be added to the master supper idea list!  So easy, delicious and hearty -

Cheeseburger Macaroni

8 oz. (2 C.) elbow macaroni
1 lb. ground beef
1 medium onion, chopped
2 - 14.5 oz. cans of Italian stewed tomatoes (I chopped these into smaller pieces.)
1/2 C. ketchup
1 tsp. pepper
1/2 tsp. salt
1 C. shredded cheddar

Cook and drain macaroni.  Cook and drain beef and onion.  Add tomatoes, ketchup and seasonings to beef.  Mix in macaroni.  Simmer for 7-10 minutes.  Sprinkle cheddar over top immediately before serving.