PREPARATION:

1. Preheat broiler. Slice upper 1/8 inch off stem end of tomatoes using paring knife; reserve tops. Core tomatoes using small melon baller or by carefully pinching out core using thumb and index finger.
2. Fill each tomato with cheese; top with slice of pepperoni. Cover with reserved tomato top; secure with toothpick.
3. Place filled tomatoes on baking sheet. Broil about 6 inches from heat for 3 minutes or until cheese is melted and tomatoes just begin to shrivel.
4. Transfer tomatoes to paper towel-lined plate to drain. Remove toothpicks before serving. Serve warm.