Slice the zucchini into even rounds, about 1/4 inch thick for crispier chips or up to 1/2 inch thick for softer centers. Pat the slices dry with paper towels.
In a shallow bowl, combine the panko bread crumbs, Parmesan cheese, salt, pepper, and any optional seasonings.
Crack the eggs into a second shallow bowl and beat with a fork until well combined.
Place the flour in a third shallow bowl.
Dip each zucchini slice into the flour, shaking off the excess. Then dip it into the beaten eggs, letting the excess drip off.
Dip each zucchini slice into the flour, shaking off the excess. Then dip it into the beaten eggs, letting the excess drip off.
Press each zucchini slice into the panko mixture, coating both sides evenly. Place the breaded slices on a plate or tray.
Lightly spray the air fryer basket or tray with nonstick cooking spray. Arrange the zucchini slices in a single layer, working in batches if needed.
Lightly spray the tops of the zucchini with cooking spray.
Air fry at 375°F for 6 minutes. Flip the zucchini slices, spray the second side lightly, and cook for another 5 minutes, or until golden brown and crispy.
Serve immediately with ranch, marinara, garlic aioli, or your favorite dipping sauce.