What a very helpful system! Thank you for sharing. One of my favorite dishes to cook (and eat), "Pasta with Caramelized Onion Sauce," is flexible, in a similar way. The onions are the base, and you vary the combination of types of greens, nuts, wine, and cheese. The recipe for it comes from The Moosewood Cookbook, and it is a fabulous dish for entertaining or weekends (it takes too much time for a normal weekday evening).