Preheat broiler. Place peppers (skin side up) on a baking sheet coated with cooking spray. Broil 15 minutes or until blackened. Place peppers in a large zip-lock bag for 15 minutes. Peel and discard skins. Place pepper halves in a 13x9 inch baking dish coated with cooking spray.
In a large bowl, mix the chicken through the tortillas. Fold in enchilada sauce.
Spoon chicken mixture evenly among the 8 pepper halves.