Preheat the air fryer. Set it to 400°F (200°C) for 3–5 minutes. A hot basket helps the crust crisp up fast.
Prep the salmon. Pat the fillets dry on all sides with paper towels.
Dry fish equals better browning and a firmer crust.
Make the binding layer. In a small bowl, mix the olive oil (or butter), Dijon, and lemon juice. This helps the crust stick and adds flavor.
Mix the crust. In another bowl, combine panko, Parmesan, garlic powder, onion powder, smoked paprika, parsley, salt, and pepper. Stir well so the seasoning is even.
Assemble. Brush the top of each salmon fillet with the Dijon mixture.
Press about 2 tablespoons of the crust mixture onto each piece. Pack it gently so it adheres without crumbling.
Prepare the basket. Lightly spray or oil the air fryer basket to prevent sticking. Place salmon skin-side down in a single layer with space between pieces.
Air fry. Cook at 400°F (200°C) for 7–10 minutes, depending on thickness.
Thinner fillets may be done at 7 minutes; thicker pieces may need up to 10. You’re aiming for an internal temperature of 125–130°F for medium and a crust that’s golden and crisp.
Rest briefly. Let the salmon rest for 2 minutes in the basket. This helps the juices settle and the crust set.
Serve. Finish with a squeeze of lemon and a sprinkle of fresh parsley.
Pair with a simple salad, roasted veggies, or rice.