Onion Salad Dressing
["1/4 c. vinegar", "1/4 c. water", "1 c. sugar", "1 tsp. salt", "1 tsp. dry mustard", "1 small onion", "1 tsp. celery seed", "3/4 c. oil"]
["In blender, mix first 7 ingredients.", "Slowly add oil.", "Most of the time, I also add some catsup.", "Blend."]
["vinegar", "water", "sugar", "salt", "dry mustard", "onion", "celery", "oil"]