Pat the fish dry. Use paper towels to dry the skin and cavity thoroughly. Dry skin equals crisp skin, so don’t skip this step.
Score the skin. Make 2–3 shallow diagonal cuts on each side of the fish.
This helps the seasoning penetrate and prevents the skin from curling.
Season inside and out. Rub the fish with olive oil, then sprinkle on salt, pepper, paprika, and onion powder. Massage the seasoning into the cuts and the cavity. Add minced garlic and a light squeeze of lemon juice.
Stuff for flavor. Tuck lemon slices and herb sprigs into the cavity.
This releases aroma and keeps the flesh fragrant while cooking.
Preheat the air fryer to 380°F (193°C). A hot basket gives you better browning. Lightly spray the basket with cooking spray to reduce sticking.
Air-fry the tilapia. Place the fish in the basket, not touching the sides. Cook for 10–12 minutes, then carefully flip using two spatulas.
Cook another 6–10 minutes, until the skin is crisp and the thickest part reaches 145°F (63°C).
Rest and finish. Let the fish rest for 3 minutes. Squeeze with fresh lemon and top with chopped parsley or cilantro. Serve whole or gently lift off the fillets with a spoon.