Hot Light Potato Salad
["4 c. unpeeled thinly sliced red potatoes", "1 Tbsp. margarine", "1 c. chopped onion", "1/2 c. mayonnaise", "1/3 c. apple cider vinegar", "1 Tbsp. sugar", "1/2 tsp. salt", "1/4 tsp. pepper", "1 Tbsp. parsley"]
["Cook potatoes in boiling water to cover 8 to 10 minutes or until tender.", "Drain and set aside."]
["potatoes", "margarine", "onion", "mayonnaise", "apple cider vinegar", "sugar", "salt", "pepper", "parsley"]