1. Preheat oven to 350°. Cut 1/2 to 1 1/2 inches from top of each bread round; scoop out center, leaving a 1/2-inch-thick shell. Reserve soft centers for another use. Lightly coat bread shells and, if desired, cut sides of tops, with cooking spray. Place, cut sides up, on baking sheets. Sprinkle with cheese.
2. Bake at 350° for 8 to 10 minutes or until toasted.
*6 (4-inch) hoagie rolls may be substituted.