What I love best about this recipe is that you can prep a big batch of mozzarella sticks, freeze them and they're ready to fry them when you want them. Freeze them on a sheet pan first for 20 to 30 minutes. Then transfer them to a large freezer bag. Squeeze out the air and then keep them in the freezer for up to 3 months. When you're ready to fry a batch, you can fry them from frozen following the instructions in the recipe.