Preheat oven to 400 degrees F and spray your baking sheet with your preferred non-stick cooking spray. Evenly spread you bell peppers and onion on the baking sheet.
In a medium sized bowl combine your spices. Toss in your sliced chicken breasts, drizzling with your olive oil and mix until your chicken is thoroughly coated with the spices.
Spread your spiced chicken strips out in an even single layer over your peppers and onions, trying not to let your chicken overlap.
Roast in oven until the chicken is cooked through, roughly 20 – 25 minutes. Remove your sheet pan from the oven and crank up the temperature to high broil. Once to temp, place your sheet pan back in the oven on the top rack and cook for an additional 5 minutes, or until everything is lightly charred. Your chicken should have an internal temperature of 165 degrees.
Serve with fresh tortillas and your favorite toppings.
