Potato Salad
["2 to 3 lb. potatoes, peeled and cubed", "1/2 c. chopped celery", "1 medium onion, chopped", "4 hard-boiled eggs", "1 1/2 to 2 c. mayonnaise", "2 Tbsp. mustard (not dry)", "salt and pepper"]
["Boil potatoes in salt water, then drain.", "While potatoes are still warm, mix in the rest of the ingredients.", "Refrigerate until cold.", "Keeps up to 2 weeks."]
["potatoes", "celery", "onion", "eggs", "mayonnaise", "salt"]