01 - In a large bowl, toss the chicken slices with olive oil, chili powder, cumin, paprika, garlic powder, salt, and black pepper until evenly coated.
02 - Heat a large skillet over medium-high heat. Add the seasoned chicken and cook for 5 to 7 minutes, stirring occasionally, until cooked through and lightly browned. Remove from the pan and set aside.
03 - In the same skillet, add the bell peppers and onion. Sauté for 5 to 6 minutes until softened and slightly caramelized. Remove and set aside.
04 - Wipe the skillet clean and reduce heat to medium. Melt a small amount of butter in the pan.
05 - Place one tortilla in the skillet. Sprinkle one-quarter of the cheese mixture onto half of the tortilla, then top with one-quarter of the cooked chicken and sautéed vegetables. Fold the tortilla over to enclose the filling.
06 - Cook for 2 to 3 minutes on each side, pressing gently, until the tortilla is golden brown and the cheese has melted.
07 - Repeat the assembly and cooking steps with the remaining tortillas and filling.
08 - Slice each quesadilla into wedges and serve warm, garnished with salsa, sour cream, cilantro, and lime wedges as desired.