Although you can make your own dough for these dumplings, it is time-consuming.
All brands are about equal in quality.
Leftover skins may be frozen for future use. They will keep, double-wrapped in plastic, then in foil, for 2 months. To use, defrost and bring to room temperature. In a large bowl, combine all the ingredients except for the dough skins and mix until the consistency is smooth and even. Place in a shallow dish and refrigerate, uncovered, for 4 hours or, covered, overnight.