NOTE: One of the great things about this dish is that it is a great template recipe for a lot of different variations. For example, if you are in a Southwestern mood, use bacon instead of the ham (or in addition to), chopped fire-roasted green chiles, even black beans as your filling. Cooked, crumbled sausage is a nice option. Make it vegetarian and throw in some sauteed mushrooms (drain any liquid from the mushrooms before adding to the ramekins). Broccoli, zucchini...shrimp or crab...anything you can envision in an omelette can be used to customize your dish.