If you don't have fatty ground pork, add 2 slices of minced bacon to the mixture. The fat from the bacon will give the dumplings the necessary richness. Look for garlic chives that are flat. The other kind, which has thicker blades that blossom, can be more fibrous. If you don't have light soy sauce, substitute 2 tablespoons soy sauce. To freeze uncooked dumplings, place them flat-side down on a parchment-lined baking sheet. Freeze until firm, about 1 hour. Transfer to a resealable plastic bag and freeze until fully frozen, up to 1 month. Cook from frozen, adding a few more tablespoons of water, if necessary.