Preheat oven to 350 degrees. Spray two large baking sheets with cooking spray.
In a large bowl toss the cooked shredded chicken with chili powder and cumin.
Place 8 tortillas flat on the sheet pans. Top with cooked chicken, diced peppers and onions and cheese.
Place a second tortilla over top of each quesadilla and spray with cooking spray.
Bake for 10-15 minutes until golden and slightly crispy. Cut into six pieces with a pizza cutter and serve with salsa and plain yogurt or sour cream for dipping.