01 - In a medium bowl, combine sliced chicken, olive oil, chili powder, cumin, smoked paprika, salt, and black pepper. Mix thoroughly to coat chicken evenly.
02 - Heat a large skillet over medium-high heat. Add seasoned chicken and cook 5-6 minutes, stirring occasionally, until fully cooked through. Transfer chicken to a plate and set aside.
03 - In the same skillet, add sliced bell peppers and onion. Sauté over medium heat for 5-6 minutes, stirring occasionally, 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 1/4 of the combined cheeses over half the tortilla. Top with 1/4 of the cooked chicken and sautéed vegetables. Fold tortilla in half to cover the filling.
06 - Cook 2-3 minutes per side, gently pressing with a spatula, until golden brown and cheese is fully melted. Transfer to a plate and keep warm. Repeat with remaining tortillas, filling, and butter.
07 - Slice quesadillas into wedges and serve immediately with sour cream, salsa, fresh cilantro, and lime wedges on the side.