Watergate salad, also referred to as Pistachio Delight or Shut the Gate salad, is a side dish salad or dessert salad made from pistachio pudding, canned pineapple, whipped topping, crushed walnuts or pecans, and marshmallows. The ingredients are combined and then often chilled. It is a popular dish in areas of the U.S. where potlucks are common.