Often when making dumplings (or potstickers, gyoza, jao zi, etc.) you'll end up with extra fillling. Here is one recipe that solves this leftover problem. This was adapted from an excellent recipe from the NY Times, Mark Bitten's blog, 11/18/09, "Meatballs, Chinese Style."
Take leftover dumpling fillling and add an egg white and about 2 tsp tapioca starch. You can add more salt if ou like, or a tsp of soy sauce or fish sauce. The mixture will be very wet but don't worry the poaching in stock will firm them up.
Mince an inch of ginger and finely slice the white parts of a leek or a small handful of Chinese chives or a couple of green onions. Heat veg oil, add ginger and onion but don’t brown just get it softened. Add about 6-8 small heads of baby bok choy roughly chopped. Or use an equivalent amount of regular bok choy or Napa cabbage, coarsely cut up. It looks big at first but the greens cook down so much, you’ll be surprised.
Add white pepper and 2/3 to 1 cup of chicken or pork stock. Stir, then cover the wok or pan w/lid and let the bok choy cook down a little. After a minute or two, shift the bok choy over to one side of the pan. Make the dumpling filling into balls, don’t have to be precise here, and gently ease them into the cooking liquid next to the bok choy. Cover the pan and simmer for 10 minutes. The bok choy will be very overcooked but so yummy.
The broth is pretty amazing. I don’t usually reduce or thicken it. If you have leftover broth from meal, this can be used in another stirfry or as a soup base. Check for seasoning, add a few drops of sesame oil and soy sauce to taste.
Serve, of course, with rice.
Note: I’ve made this recipe several times from scratch (no leftover filling.) Making the meatballs from a lb of ground pork, 1 tbs fish sauce, ½ small minced onion, , white pepper , tiniest pinch of sugar, egg white (small egg), 1 tbs starch (corn or tapioca.) It makes a lot but then you have -- leftovers!