Cut 5 horizontal cuts in each chicken breast, cutting only halfway through.
Coat chicken breast in olive oil, chili powder, and cumin. Season with salt and pepper, to taste.
Select the preset program of Preheat to preheat air fryer.
Stuff each cut in each breast with slices of onion and peppers.
Place stuffed chicken breasts in the air fryer.
Select Preheat program and set the temperature to 400°F/200°C and time to 15 to 20 minutes, then press Start/Stop to roast until lightly browned.
Sprinkle cheese over chicken. Set temperature to 400°F/200°C and set time to 2 minutes, then press Start/Stop. Cook until cheese is melted.
Garnish with cilantro and serve.
Tip: Serve with brown rice and black beans for a complete meal.