If you're a big fan of onion rings from Burger King, you probably already know about the spicy dipping sauce offered from the world's number two burger chain (it's not always on the menu, and you usually have to request it). The creamy, mayo-based sauce seems to be inspired by the dipping sauce served with Outback's signature Bloomin Onion appetizer, since both sauces contain similar ingredients, among them horseradish and cayenne pepper. If you're giving the clone for Burger King Onion Rings a try, whip up some of this sauce and go for a dip. It's just as good with low-fat mayonnaise if you're into that. And the stuff works real well as a spread for burgers and sandwiches, or for dipping artichokes.