Pat the salmon dry. Blot each fillet with paper towels. Dry surfaces help the glaze cling and the edges caramelize.
Make the marinade. In a small bowl, whisk soy sauce, honey, rice vinegar, sesame oil, garlic, ginger, and black pepper until smooth.
Marinate briefly. Place salmon in a shallow dish or a zip-top bag.
Pour in about two-thirds of the marinade, coating all sides. Let sit 10–15 minutes at room temperature. Reserve the remaining marinade to brush later.
Preheat the air fryer. Set it to 390°F (200°C) for 3–4 minutes. A hot basket prevents sticking and promotes crisp edges.
Prep the basket. Lightly spray or rub the basket with oil.
If your salmon has skin, plan to cook it skin-side down.
Air fry the salmon. Arrange fillets in a single layer, not touching. Cook at 390°F (200°C) for 6–8 minutes, depending on thickness.
Brush with glaze. Quickly open the basket and brush the tops with the reserved marinade. If you like a thicker glaze, simmer the reserved marinade with 1 teaspoon cornstarch and 2 teaspoons water for 1–2 minutes until glossy, then brush.
Finish cooking. Air fry 1–3 more minutes, until the salmon flakes easily and reaches an internal temperature of 125–130°F for medium or 145°F for well-done.
Avoid overcooking.
Rest and garnish. Let salmon rest 2 minutes. Sprinkle sesame seeds and green onions. Serve with lemon or lime wedges.
Serve with sides. Great with jasmine rice, brown rice, quinoa, steamed broccoli, snap peas, or a cucumber salad.