Preheat broiler. Cut each grapefruit in halves, remove seeds, and then cut around sections (but leave them in) so the fruit can be easily removed when eating.
Sprinkle each half with a little brown sugar. Dot each half with softened butter or margarine. Broil for 10 minutes or until golden and heated through. Makes 2 servings. Enjoy!
Note: Each broiler cooks at a different speed, so keep a close eye on the grapefruit to make sure the brown sugar doesn't burn!