Begin by rinsing the cod fillets under cold water and patting them dry with a clean kitchen towel. Season both sides generously with salt and pepper.

In a medium-sized mixing bowl, combine the panko breadcrumbs, grated Parmesan cheese, garlic powder, onion powder, dried oregano, paprika, salt, and pepper. Mix thoroughly.

In a separate bowl, whisk together the mayonnaise, Dijon mustard, and lemon juice until smooth and creamy.

Using a pastry brush, spread the mayonnaise mixture onto one side of each cod fillet and then press into the breadcrumb mixture.

Preheat your air fryer to 400°F (200°C) for about 5 minutes.

Place the coated cod fillets in the air fryer basket and air fry at 400°F (200°C) for 10-12 minutes, or until the crust is golden brown and the internal temperature reaches 145°F (63°C).

Carefully remove the fillets from the air fryer and garnish with freshly chopped parsley.