Preheat your air fryer to 400°F (200°C) for about 3 minutes to get it ready for cooking.
Gently pat the salmon fillets dry with paper towels; this helps achieve crispiness.
Lightly brush the top of each fillet with olive oil using a small brush; this helps the cracked pepper adhere and promotes even browning.
Generously crack fresh black pepper over the oil-brushed side of the salmon, creating an even coating that will form a beautiful, aromatic crust during cooking.
Sprinkle a pinch of salt over the pepper-coated surface to enhance flavor.
Place the salmon fillets, skin-side down, into the air fryer basket, making sure they aren’t touching for even air circulation.
Cook the salmon for 8-10 minutes, or until the pepper crust crackles and turns golden, and the flesh feels firm yet springy when pressed.
Once cooked, carefully remove the salmon from the air fryer and let it rest for a minute to allow the juices to settle.
Squeeze fresh lemon juice over the fillets if desired, adding a bright, zesty flavor that complements the crispy pepper crust.
Serve immediately, showcasing the crispy pepper crust and tender, flaky flesh of the salmon, perfect for a satisfying main course.