Prepare stuffing per box directions. Preheat oven to 350°F. Spray baking dish with nonstick spray.
Season chicken with pepper. Sear seasoned chicken in oil until browned on both sides, then place in a greased baking dish.
In small bowl, combine soup with rosemary and garlic, then spoon over chicken.
Top with stuffing (about ¾-1 cup per breast). Bake uncovered for 30-45 minutes, or until chicken is cooked through. Broil for the last few minutes to toast the stuffing, if desired.