Grilled Chipotle Chicken Quesadillas

In a small bowl, use a fork to mash the chipotle peppers, sugar, garlic and spices together into a paste. Add the chicken, mix well to coat and let marinate 15 minutes. Prepare and heat the grill to medium-high. Place the chicken on the hot grill and cook for about 4 minutes on each side, or until chicken is thoroughly cooked. Remove the chicken from the grill, let sit for 5 minutes, then slice the chicken into thin strips. Lay out the tortillas on a clean work surface and evenly distribute the sliced chicken, cheese, green onion and roasted red peppers on half of each tortilla. Fold the other half of the tortilla up and over the filling, press gently and spread lightly with butter. Heat a large non-stick skillet over medium high heat, lay two quesadillas, butter side down, side by side and cook 2-3 minutes until lightly browned. Flip them over and cook until the cheese is melted and the tortilla is browned on the other side. Remove, set aside and repeat the process until all quesadillas are cooked. Serve whole or sliced into triangles.