Step 1

Arrange zucchini slices in a single layer on a plate lined with paper towels. Sprinkle evenly with 1/2 teaspoon of the salt. Let stand 15 minutes, and blot dry.

Step 2

Whisk together flour, black pepper, and remaining 1/2 teaspoon salt in a shallow dish. Whisk together eggs and water in a separate shallow dish. Stir together panko, Parmesan, pecorino, and oil in a third shallow dish.

Step 3

Working in batches, dredge zucchini slices in flour mixture, shaking off excess. Dip in egg mixture, allowing excess drip, and dredge in panko mixture, pressing to adhere. Place slices on a rimmed baking sheet.

Step 4

Preheat a 6.3-quart air fryer to 390°F for 10 minutes. Coat air fryer basket with cooking spray. Working in batches, add zucchini slices to basket, and cook until golden brown and crisp, 3 1/2 to 4 minutes per side. Serve immediately.