Preheat broiler. cut 9 plum tomatoes in half lengthwise. Scoop out and discard seeds. Place tomato halves on a jelly roll pan coated with cooking spray. Sprinkle 1/2 tsp. dry seasoned breadcrumbs over each tomato half, and top with 1 tsp. shredded mozzarella cheese. Coat tomatoes lightly with cooking spray. Broil 2 to 3 minutes or until cheese bubbles.