Moisten the edges with water and then fold them over into a half moon shape. Pinch to seal. 7.If you are freezing, place the on the baking sheets so that they do not touch, and freeze until they are solid, approximately three hours. Seal in plastic bags. There are many ways to cook them, but my favorite is a combination of steaming and frying.
Black vinegar is another good addition to the steaming water.
Heat 1-2 tablespoons oil, including some hot chili oil, in a pan over medium high heat. When the oil is hot, add the potstickers and fry for about 2 minutes. Add the liquid to the skillet, cover and cook for about three minutes, or until the liquid is almost absorbed. Uncover and let the potstickers fry until they are crisp again, about one minute. Or anything else that seems good to you.