Sloppy Joes - cooking recipe

Ingredients

3 lb. ground beef
1 1/2 Tbsp. Worcestershire sauce
1/4 c. brown sugar
1/2 c. water
2 Tbsp. vinegar
2 Tbsp. mustard
2 c. catsup
2 onions
1 tsp. ???

Preparation

Cook ground beef until browned.
Pour off excess fat.
Add remaining ingredients and cook until thickened.