01 - In a medium bowl, combine sliced chicken with olive oil, chili powder, cumin, smoked paprika, salt, and black pepper. Mix thoroughly until chicken is evenly coated.
02 - Heat a large skillet over medium-high heat. Add seasoned chicken and cook 5-6 minutes, stirring occasionally, until fully cooked through. Transfer to a clean plate.
03 - In the same skillet, add sliced bell peppers and onion. Sauté over medium heat for 5-6 minutes until softened and lightly caramelized. Remove from heat.
04 - Wipe out the skillet and return to medium heat. Melt 1/2 tablespoon butter in the pan.
05 - Place one tortilla in the skillet. Sprinkle one-quarter of the combined cheeses over half the tortilla. Top with one-quarter of the cooked chicken and sautéed vegetables. Fold tortilla in half over the filling.
06 - Cook 2-3 minutes per side, gently pressing with a spatula, until golden brown and cheese is melted. Transfer to a warm plate. Repeat with remaining tortillas, filling, and butter.
07 - Slice quesadillas into wedges. Serve immediately with sour cream, salsa, cilantro, and lime wedges.