Preheat the oven to 400 degrees. Spray a sheet pan with cooking spray and set aside.
Cut chicken crosswise into 1 inch wide strips. Toss with half the oil and fajita seasoning. Place on one half of the sheet.
Combine onions and peppers on the other half of the sheet pan. Drizzle with remaining oil; sprinkle with chili powder, cumin, salt and pepper.
Sprinkle everything with lime juice.
Roast in preheated oven, stirring once or twice, for 20 to 25 minutes or until chicken is no longer pink inside and vegetables are tender.
Meanwhile, wrap tortillas tightly in foil and place in the oven for 5 minutes to heat.
Transfer chicken and vegetables to a heated platter and serve with tortillas, cheddar, avocados, salsa, and sour cream. Have each diner spoon some chicken mixture into a tortilla, pile high with toppings, and roll up to eat.
Notes
Recipe from 125 Best Chicken Recipe by Rose Murray. Published February 1st 2014 by Robert Rose.