Not that I've ever made them, but there's a recipe in the Joy of Cooking for dumpling wrappers. Essentially, an egg, some flour, and a pinch of salt, then u go to work with the rolling pin. I'd probably fill them with a blend of mashed potatoes, onion, and shredded cheese, maybe add a pinch of herbs. I'm pretty sure u could substitute Chinese dumpling wrappers for the cases.