2 red grapefruits, halved
4–8 tbsp. light muscavado sugar
1. Set an oven rack 4" from broiler; preheat. Halve cherries, set aside. Trim the ends of grapefruits so that they sit flat when upright; transfer to a baking sheet, cut side up.
2. Run a knife around edges and between sections of grapefruit to loosen. Sprinkle each half with 1–2 tbsp. sugar; place 1 cherry half, rounded side up, in the middle of each grapefruit. Broil until bubbling with caramelized sugar, 5–6 minutes.