1 sm. onion
1 c. mayonnaise
1/3 c. oil
1/4 c. catsup
2 tbsp. sugar
Dash of pepper
1 tsp. prepared mustard
1/2 tsp. salt
1/2 tsp. paprika
1/4 tsp. celery salt
1 c. blue cheese (4 oz.)

Put all ingredients except cheese in blender. Cover; blend until smooth. Stir in crumbled blue cheese. Cover and chill. Makes 2 1/2 cups of dressing.