1 med. onion
1/2 c. catsup
1/2 c. vinegar
1/4 c. sugar
1 c. corn oil
2 tbsp. lemon juice
1 tsp. celery seed
1/8 tsp. paprika
1/2 tsp. salt
1/2 tsp. mustard (dry)

Combine all ingredients in blender and mix for a few minutes. Makes 1 quart.