ground ginger (ground cinnamon is a good substitute or addition)
optional: banana slices (strawberries would be nice too)
Prepare oven for broiling. Position oven rack on top.
Cut grapefruit(s) in half. Using a small serrated knife or grapefruit knife, loosen the grapefruit sections from the membrane. Place the grapefruit halves on a baking sheet or shallow baking pan.
Drizzle grapefruit halves with honey. Place banana slices on top and flip once to coat both sides with honey. Dust with ground ginger (and/or cinnamon).
Place under broiler until bubbling and slightly browned in spots, about 4 to 6 minutes. Keep an eye on during broiling to avoid burning.