1 slice onion
1 tsp. salt
1 tsp. celery salt or seed
1 tsp. dry mustard
1 tsp. paprika
1 c. sugar
1/2 c. vinegar
1 c. salad oil

Place ingredients in blender except salad oil and process at whip until well blended. Remove lid; add oil. Blend again. Store in refrigerator.