Yes, you can freeze the vegan mozzarella sticks before or after frying. Before frying: Bread the hearts of palm, place them on a parchment-lined tray, and freeze for 1-2 hours. Then transfer to a freezer-safe container or bag, separating the layers. Fry or bake them directly from frozen when you're ready to enjoy! After frying: Allow them to cool, then place them on a baking sheet in the freezer for 1-2 hours until hardened. Transfer them to a freezer-safe container or bag, separating layers with parchment paper. They stay good for 2-3 months. To reheat, bake in a preheated oven at 375ºF (190ºC) for 15-20 minutes until heated through and crispy.