When you are just about ready to put your pitas together it is time to "fry" the zucchini. In a bowl, whisk together the egg. In another bowl, whisk together the Panko, flour, parmesan, salt and pepper. Heat a large skillet over medium heat and add olive oil. Dip each zucchini slice in the egg mixture to coat, then dredge through the breadcrumbs, pressing gently to adhere. Place in the skillet and cook until golden. This took me about 3 to 4 minutes per side. When finished, remove the slices and let drain on a paper towel.