Make dipping sauce by mixing all sauce ingredients in a small bowl. Set aside.In a mixing bowl, combine all filling ingredients except for Napa cabbage. Stir well to thoroughly combine. Add Napa cabbage, stirring to combine.Place about 1 TB of the meat filling into the center of a wrapper. Dab water around the edges of wrapper. Fold wrapper in half, into a semi-circle, and press edges tightly to seal well. If desired, fold/pleat the potsticker (see video link for visual.)Place folded potstickers on a lightly floured surface.Coat a large frying pan well with oil - don't be shy - entire bottom should be coated with a thin layer of oil. Heat oil to warm (not overly hot) and place potstickers carefully in the pan, without overcrowding them. Cook on medium-high heat until bottoms are nicely browned. Pour in 1 cup of water (be careful of splatter) and cover pan immediately. Cook for 5 minutes, or until liquid is evaporated and filling is cooked through.Transfer to a paper towel lined plate. Repeat in batches. Serve immediately, with or without dipping sauce.* Note: Uncooked wrapped potstickers may be frozen. Place in single layer on a platter, freeze, and transfer to airtight bag. May be kept frozen for a month or two.