Preheat. Preheat your deep fryer to 375°F (190°C).
Prepare the breading station. Mix the flour with salt and pepper in a shallow dish. Then, whisk the eggs in another shallow dish. In a third dish, combine the panko bread crumbs, Parmesan cheese, garlic powder, and Italian seasoning.
Bread the zucchini slices. In small batches, cover every zucchini slice with the flour mixture, shaking off any excess. Then, dip it in the beaten eggs, letting any extra drip off. Finally, cover the zucchini slice with the panko mixture, pressing gently to make sure the breading is even.
Fry the zucchini slices. Carefully lower the breaded zucchini slices into the hot oil, working in batches to avoid overcrowding. Fry for 2-3 minutes per side, or until golden brown and crispy. Use a slotted spoon or tongs to remove the zucchini from the oil and transfer to a cooling rack set over a baking sheet
Serve. While still warm, sprinkle the fried zucchini with additional salt, if desired. Serve immediately with marinara sauce, ranch dressing, or your favorite dipping sauce.