Red Clam Chowder
["1 small onion, chopped", "3 medium potatoes, diced", "1 can minced clams", "1 can whole baby clams", "1 tsp. vinegar", "1 can tomato soup", "1 can water"]
["Add enough water to cover potatoes.", "Cook until potatoes are done."]
["onion", "potatoes", "clams", "baby clams", "vinegar", "tomato soup", "water"]