Preheat your oven to 400 degrees. Slice the peppers, onion, and chicken into thin strips (about 1/4-1/2 inch wide). Make sure the chicken pieces are of even thickness to prevent uneven cooking.
Put these pieces into a large bowl and add the avocado oil and spices. Mix together and spread out evenly on a parchment lined rimmed baking sheet.
Bake for 25-30 mins until cooked through and beginning to brown. Serve in tortillas, on top of a salad, or in a rice bowl with your favorite toppings. Enjoy!
Notes
These chicken fajitas can be stored in an air-tight container in the fridge for up to 4 days. Reheat in a pan on the stove or in the microwave.