Yes you can freeze air fried zucchini. Make sure it is completely cooled, then put the pieces on a baking sheet in a single layer. Put the tray in the freezer for a couple of hours before packing them in a zip lock bag or freezer container. My favorite way to freeze just about everything is vacuum sealing. I have a Food Saver vacuum sealer and freezing food this way avoids freezer burn and lasts much longer in the freezer.