Preheat oven to 425℉.
In a large bowl, combine onion, bell pepper, chicken tenders, olive oil, salt and pepper and spices.
Toss to combine.
Spray baking sheet with non stick cooking spray.
Spread chicken, bell peppers and onions on baking sheet.
Cook for about 20 minutes, then turn oven to broil and cook for additional 1-2 minutes just letting the veggies pick up some color. Watch carefully to make sure they don't start to burn.
In the last five minutes of cooking before broiler is on, let tortillas wrapped in foil warm in the oven.
Squeeze juice from fresh limes over fajita mixture while hot and top with fresh cilantro.
Serve in warm tortillas.
