1 1/2 lb. hamburger
3 big onions (3")
1 tbsp. Crisco
3/4 c. ketchup
2 tbsp. vinegar
2 tbsp. sugar
2 tbsp. Worcestershire
1/2 tsp. prepared mustard (yellow)

Saute first 3 ingredients until onions are clear and meat brown. Mix remaining ingredients in a saucepan. Heat through. Mix sauce and meat together. Cook 10 minutes. Serve on sandwich buns.