http://www.alltoprecipes.com
There are plenty of Sloppy Joe recipes out there, but this particular dish came from a NY State High School cafeteria. Back in the day, everyone got "doubles" on Sloppy Joe Tuesday! True story :)
1 lb. hamburg (ground beef, ground chuck or ground round)
3/4 c ketchup
1/4 c tomato sauce
1/4 c vinegar
1/4 c water
3 TBSP sugar
3 TBSP chopped celery
1/2 tsp dry mustard
1 onion chopped
1/2 tsp Worcestershire or steak sauce
Brown hamburg, celery, and onion in large skillet over medium heat. When celery and onions are tender, drain excess grease and return mixture to skillet.
Add remaining ingredients to skillet and simmer for approx 20 to 30 minutes.