Preheat the oven to 400 degrees. Cut tomatoes in half and scoop out seeds and membranes until hollow. In a mixing bowl, combine the basil leaves, garlic, olive oil, pine nuts and stuffing mix. Toss until stuffing is moist. Stuff the tomatoes with the stuffing, sprinkle with Parmesan cheese, and bake 20 minutes, or until cheese is golden brown and tomatoes are soft.