Preheat the broiler. Slice an "X" into the tops of the tomatoes to about halfway down and set them aside.
Make a paste of the butter, Vegetable Magic®, and, if desired, the Parmesan cheese. Spread half of the mixture on top of each tomato, pushing a little of the mixture down into the scoring. Place the tomatoes in a shallow pan, seasoned side up. Broil with the tomato tops about 1-inch from the heat until the tops are brown and crusty, about 3 minutes. Spoon the juices from the bottom of the pan over the tops and serve immediately.
Cooking Tip: Keep broiler door slightly cracked during cooking.