2 lg. onions, sliced thin
1/2 c. vinegar
1/2 c. water
3 tbsp. sugar
1/2 c. mayonnaise
1/2 c. sour cream
1 tbsp. celery seed

Let the onions, vinegar, water and sugar set overnight. Drain the next day and mix with mayonnaise, sour cream, celery seed, salt and pepper to taste.