Preheat your air fryer to 400°F (200°C) and lightly spray the basket with oil to prevent sticking.
In a small bowl, whisk together Dijon mustard, olive oil, lemon juice, and honey or maple syrup if using. This creates a tangy, slightly sweet glaze.
Pat the salmon fillets dry with paper towels, then season them lightly with salt and pepper. If desired, sprinkle dried herbs on top for extra aroma.
Spread a thin, even layer of the mustard glaze over the top of each fillet, ensuring all surfaces are coated without excess dripping.
Lightly brush or spray the air fryer basket with oil, then place the salmon fillets skin-side down inside the basket.
Cook the salmon at 400°F for 10-12 minutes, until the skin is crispy and the glaze bubbles and caramelizes. You’ll hear a sizzling sound and see the glaze darken slightly.
Gently flip the salmon fillets halfway through cooking to ensure even crisping and caramelization, taking care not to break the skin.
Check for doneness— the salmon should be opaque and tender, with a crispy skin and a flavorful, caramelized glaze on top.
Remove the salmon from the air fryer and let it rest for a minute. The skin will be crackly, and the inside flaky and moist.
Serve immediately, garnished with fresh herbs if desired, and enjoy the crispy, tangy, and tender salmon with a side of your choice.
