Toss the chicken with the fajita seasoning and spread on the baking sheet.
Place chicken under the broiler and cook for about 5 min or until no longer pink in the center.
Preheat oven to 350.
Heat the oil in a large saucepan over medium heat. Stir in peppers, onion and chicken. Cook and stir until the vegetables have softened- about 10 minutes.
Layer half of each tortilla with the chicken and vegetable mixture.
Sprinkle with the cheddar cheese, bacon bits and cheese.
Fold the tortillas in half and place on a baking sheet.
Bake quesadillas until cheese has melted- about 10 min.