1. Preheat grill to High.
2. Leave skin on bananas, trim ends and cut in half lengthwise.
3. Brush cut sides with maple syrup and generously sprinkle with brown sugar. Dust with cinnamon.
4. Arrange bananas cut side up, on hot grill, prependicular to grill ridges. Close lid and cook 3-5 minutes until carmelized and fruit starts to pull away from the skin.
5. Serve alone or with vanilla ice cream and drizzled with sauce.