1. Heat a large cast-iron skillet over medium heat. Add oil to pan; swirl to coat. Add red pepper and garlic, and cook 1 minute, stirring frequently. Add kale and 2 tablespoons water; cook 4 minutes or until kale wilts, stirring occasionally.
2. Divide half of cheese evenly among 4 bread slices. Top evenly with smoked turkey and kale mixture. Top evenly with remaining half of cheese and remaining bread slices.
3. Heat a grill pan over medium-high heat. Lightly coat both sides of sandwiches with cooking spray. Arrange sandwiches in pan. Place cast-iron skillet on top of sandwiches; press gently to flatten. Cook sandwiches 2 minutes on each side or until cheese melts and bread is toasted (leave skillet on sandwiches while they cook). Cut each sandwich in half.