Consider this sauce the sophisticated version of classic sour cream and onion dip. Featuring caramelized onions, the sauce is both sweet and creamy with a hint of umami—meatiness. It can be used cold as a topper for crudités or chips, but heated up with a little heavy cream it is an ideal sauce for grilled chicken breasts, pork chops or baked potatoes. It is also an excellent cold sauce for a composed salad. Use any variety of sweet onion such as Vidalia, Walla Walla or Maui Sweets for the best results.