Friggitelli peppers can be kept in the refrigerator for 4 days or they can be frozen raw or blanched. In order to clean them, remove the stalk and then the seeds and the inner parts with a knife. Then, you can wash and cut them as you like. You can fry them in a pan for 10 minutes or bake them in a preheated oven at 180° for 15 minutes, and stuff them with the filling you like best!