1. Preheat oven to 400°.2. Combine first 3 ingredients in a small bowl. Cut a horizontal slit through thickest portion of each chicken breast half to form a pocket. Stuff about 3 tablespoons cheese mixture into each pocket; close opening with a wooden pick. Sprinkle chicken evenly with salt and pepper.

3. Heat a large cast-iron skillet over medium-high heat. Coat pan with cooking spray. Add chicken to pan; cook 4 minutes. Turn chicken over; place pan in oven. Bake at 400° for 25 minutes or until chicken is done. Let stand 5 minutes. Discard wooden picks. Cut chicken diagonally into 1/2-inch-thick slices. Serve with pan juices.