Barbecue - cooking recipe

Ingredients

3 lb. hamburger
onion to taste
2 Tbsp. vinegar
1/3 to 1/2 c. brown sugar
1 Tbsp. Worcestershire sauce
1 Tbsp. mustard
1 1/2 to 2 c. or more ketchup

Preparation

Brown hamburger and onion.
Add rest of ingredients.
Simmer on low for two hours.