Potato Salad
["3 lb. potatoes with the skins on", "8 to 10 hard-boiled eggs", "3 Tbsp. vinegar", "4 Tbsp. mayonnaise", "3 stalks celery, chopped fine", "1 onion, chopped fine"]
["Boil potatoes and eggs as usual.", "Allow potatoes to cool, then peel and cut into small pieces.", "Add chopped eggs.", "Mix in a bowl with the celery, onions, vinegar and mayonnaise.", "Place in refrigerator to chill."]
["potatoes", "eggs", "vinegar", "mayonnaise", "stalks celery", "onion"]