inches of vegetable oil until golden. Panzerotti are best served piping hot. Freezing Panzerotti Freeze the raw panzerotti in one layer on a baking sheet. Once they are frozen solid, they can be transferred to plastic bags. The can be frozen up to 4 months. Reheating Panzerotti To reheat Panzerotti,simply put them on a baking sheet and warm them up in a 350 degree oven for 10 to 15 minutes. To bake frozen panzerotti, preheat the oven to 450 degrees. Lay the panzerotti on a baking sheet and cover them tightly with aluminum foil. Bake for 15 minutes. Then remove the foil and continue baking until turnovers are golden brown.