Basque Salad
["boiled potatoes", "tomatoes", "onions", "mayonnaise", "horseradish", "vinegar"]
["Cut potatoes into large chunks.", "Cook and cool.", "Cut tomatoes into large chunks.", "Slice onions.", "Mix mayonnaise, horseradish and vinegar to taste.", "Mix into vegetables."]
["potatoes", "tomatoes", "onions", "mayonnaise", "horseradish", "vinegar"]