Need help assembling dumplings, this video
helps a lot. The assembly part starts at 3 minutes and 30 seconds.
To freeze and safe for later, transfer dumplings to a baking sheet and place in the freezer for about 30 minutes or until they feel very firm. Then transfer to a freezer-safe plastic bag and freeze.
To cook dumplings straight from the freezer, follow exact directions above. Mine just needed a bit more time steaming, so add a minute or two onto the time above.