BARBECUED HAMBURGER

2 lb. hamburger
1 onion, chopped
1/2 c. catsup
2-3 tbsp. brown sugar
2 tbsp. vinegar
1 tsp. Worcestershire sauce
2 tsp. prepared mustard
1 tsp. salt

Fry onion and hamburger in 4 tablespoons oil until it has lost its red raw color. Stir until smooth and add all the other ingredients except vinegar. Simmer 20 minutes and remove from heat and add vinegar.