1/2 c. oil
3/4 c. chopped onion
3/4 c. ketchup
3/4 c. water
1/3 c. lemon juice
3 tbsp. sugar
3 tbsp. Worcestershire sauce
2 tbsp. prepared mustard
2 tsp. salt
1/2 tsp. pepper

Cook onions in hot oil until soft. Add rest of ingredients. Simmer for 15 minutes.