Potstickers freeze very well and you can often find them available for purchase at the grocery store. To freeze your own, simply stuff and seal the wrappers and lay the potstickers flat on a parchment paper-lined baking sheet. Freeze the uncooked dumplings for 30 minutes before transferring them to a Ziploc bag.  Frozen potstickers can be saved in the freezer for several months. When you are ready to cook, simply cook them as normal. You do not have to thaw potstickers to cook them but it may be helpful to let them defrost for about ten minutes before cooking.