01 - Pat zucchini slices dry with paper towels to remove excess moisture.
02 - Whisk together egg and milk in a shallow bowl.
03 - Combine panko breadcrumbs, Parmesan cheese, garlic powder, smoked paprika, salt, and black pepper in a separate bowl.
04 - Dip each zucchini slice into the egg mixture then press into breadcrumb mixture until evenly coated.
05 - Place coated zucchini slices in a single layer in the air fryer basket without overlapping; cook in batches if necessary.
06 - Cook at 400°F for 8 to 10 minutes, flipping halfway through, until golden and crisp.
07 - Serve immediately with lemon wedges and preferred dipping sauce if desired.