Set up a breading station by whisking the egg in one bowl until frothy.

In a separate bowl, combine cracker crumbs, Pecorino Romano cheese, sea salt, white pepper, cayenne pepper, and dried parsley flakes.

Dip the flounder fillets into the egg mixture, ensuring they are evenly coated.

Dredge the fillets in the cracker crumb mixture, turning to coat them thoroughly.

Preheat the Air Fryer to 390°F (200°C).

Place the coated fillets in the Air Fryer basket and cook for 5 minutes.

Turn the fillets over and cook for another 5 minutes until golden brown and crispy.

Serve immediately and enjoy!