Preheat the air fryer. Set it to 390–400°F (200–205°C) for 3–5 minutes. A hot basket helps the peppers blister quickly.
Dry the peppers well. Moisture prevents charring.
Pat them dry with a clean towel after washing.
Toss with oil and seasoning. In a bowl, coat the shishitos with oil, salt, and pepper. Use just enough oil to lightly gloss each pepper.
Air fry in a single layer. Add peppers to the basket without crowding. Cook for 6–8 minutes, shaking the basket halfway through.
You’re aiming for charred spots and wrinkled skins.
Finish and serve. Transfer to a bowl, squeeze over fresh lemon or lime, and sprinkle with flaky salt. Add any extra toppings you like and serve immediately.