01 - Combine shredded chicken with cumin, smoked paprika, garlic powder, salt, and black pepper in a medium bowl. Toss until evenly coated.
02 - Heat 1 tablespoon oil in a large skillet over medium heat. Add onion, bell pepper, and jalapeño. Sauté 3–4 minutes until softened. Add seasoned chicken and stir to combine. Cook 2 more minutes. Transfer to a bowl and wipe out skillet.
03 - Lay out tortillas. On half of each tortilla, sprinkle one-quarter of the cheese, top with one-quarter of the chicken mixture, then add another layer of cheese. Fold tortillas in half to form half-moons.
04 - Heat remaining oil in skillet over medium heat. Cook 1–2 quesadillas at a time for 2–3 minutes per side, pressing gently with a spatula, until tortillas are golden and crispy and cheese is melted.
05 - Transfer to a cutting board, rest 1 minute, then cut into wedges. Serve hot with sour cream, salsa, cilantro, and lime wedges as desired.