Sweet And Sour Dressing(Low-Fat)  
["2 c. fat-free plain yogurt", "2 1/2 c. sugar", "3/4 c. vinegar (regular or apple cider)", "1 1/2 tsp. salt", "1 1/2 tsp. pepper", "1/4 c. mustard", "2 tsp. celery (optional)", "2 tsp. chopped onion (optional)"]
["Mix all ingredients together."]
["yogurt", "sugar", "vinegar", "salt", "pepper", "mustard", "celery", "onion"]