Slice the green bell pepper into strips

Slice the red bell pepper into strips

Slice the onion into strips

Slice the chicken into thin strips

Place the chicken into the mixing bowl

Pour 1/4 cup oil over the chicken

Stir to cover the chicken in the oil

Sprinkle the fajita seasoning evenly over the chicken

Stir to combine the seasoning and the chicken

Pour 2 tablespoons of oil into the skillet

Preheat the skillet over medium-high heat

Add the peppers, onion, and mushrooms to the skillet

Cook the vegetables, stirring frequently for 5 minutes

Remove the vegetables from the pan and set aside

Add 2 tablespoons of oil to the skillet

Add the chicken to the skillet

Cook the chicken, stirring frequently for 10 minutes or until all redness is gone

Add the vegetable to the chicken in the skillet

Cook for an additional 2 minutes, stirring frequently

Serve with tortillas, cheese, and sour cream