Mix all in blender or food processor.

PART 1:
1 med. onion
3 tsp. prepared mustard
1/2 tsp. pepper
1 tsp. celery salt
1 c. sugar or NutraSweet
1 tsp. salt
1 c. oil

PART 2:
3/4 c. vinegar
4 tbsp. salad dressing or mayonnaise

Blend the first part together and then add #2 part last. Beat until all mixed together. Good on tossed salad--lettuce, tomatoes, etc. or on a Jello vegetable salad. You may like it on a fruit salad, I DON'T.