Here, to dispel memories of those long ago potluck bread-and-butter sandwiches, is a big, hot, gooey and utterly satisfying pull-apart bread creation that will have everyone asking for the recipe. It's especially nice if you know that the main course is going be something simple - soup, for example - since it's rich and filling. It can also be served as a sturdy appetizer before a light entrée - although worrying about "balancing the menu" denies the essentially anything-goes nature of a potluck.