Step 1: Prep the Ingredients
Slice the chicken breasts into even strips for quick and even cooking.
Slice the bell peppers into thin strips and cut the red onion into wedges.
Set everything aside in separate bowls.

Step 2: Season the Chicken and Vegetables
Drizzle the chicken strips with vegetable oil and sprinkle with fajita seasoning.
Toss well to ensure every strip is evenly coated.
Add the vegetables to the chicken and toss again to coat them all with seasoning.

Step 3: Cook in the Air Fryer
Preheat your air fryer to 390°F (200°C) for 5 minutes.
Place the chicken and vegetables in the air fryer basket in a fairly even layer.
Air fry for 15 minutes, tossing halfway through to ensure even cooking and a little bit of char.

Step 4: Serve and Enjoy
Serve the hot chicken and veggies immediately with warmed tortillas.
Top with pico de gallo, fresh avocado slices, or a big dollop of guacamole for an irresistible meal.
Optional garnishes like fresh cilantro or lime wedges take it over the top.