Toss chicken with olive oil, brown sugar, chili powder, paprika, garlic powder, salt, and pepper, then cook in a skillet until lightly caramelized and fully cooked.
Assemble quesadillas with cheese and sweet heat chicken, folding tortillas over the filling.
Cook quesadillas in a skillet until golden on both sides and cheese is melted, then slice and serve.
Notes
Adjust chili powder slightly to control heat while keeping sweetness balanced.