1/3 c. catsup
1/4 c. sugar
1/4 c. vinegar
1 slice of med. onion
1 tbsp. Worcestershire
1 tsp. dry mustard
1 c. salad oil

Add all ingredients except oil to food processor. Process until onion is finely chopped. With machine running pour oil slowly through feed tube. Process until desired consistency. If using electric mixer, beat all ingredients except onion and oil. Add onion finely mixed. Add oil slowly. Blend to desired consistency. Store in covered container in refrigerator.