Prep the fish: Pat the fish dry with paper towels. Slice into even sticks about 1 inch wide and 3–4 inches long.
Cold, dry fish coats better and gets crisper.
Set up the dredging station: In one shallow bowl, add the flour. In a second bowl, whisk the eggs with the Dijon until smooth. In a third bowl, combine panko, plain breadcrumbs, Parmesan, garlic powder, onion powder, paprika, oregano, salt, and pepper.
Preheat the air fryer: Set it to 400°F (200°C) for 3–5 minutes.
A hot basket helps the coating crisp quickly.
Coat the fish: Work with a few pieces at a time. Dredge in flour (shake off excess), dip in egg (let excess drip), then press into the breadcrumb mixture until fully coated. Place on a plate or tray.
Lightly oil: Mist or brush both sides of the breaded sticks with a thin layer of oil.
This promotes even browning.
Arrange and cook: Place fish sticks in a single layer in the air fryer basket, leaving a little space between each. Air fry at 400°F (200°C) for 8–10 minutes, flipping halfway, until golden and the fish flakes easily.
Check doneness: Internal temperature should reach 145°F (63°C). Thicker pieces may need an extra 1–2 minutes.
Season and serve: Sprinkle with a pinch of salt right out of the air fryer.
Serve hot with lemon wedges and your favorite dip.