- 2 1/4 cups fresh pink grapefruit juice (from grapefruits)
- 3 tablespoons honey
- 1 tablespoon grenadine
- 1/2 cup mint leaves
- 3 tablespoons sugar
- 1/4 cup white rum
- 3 tablespoons fresh lime juice
- 4 mint sprigs, for garnish
- 2 ripe mangoes, peeled and cut into 4 halves
- MAKE THE GRANITE: In an 8-inch square glass dish, stir together the grapefruit juice, honey and grenadine. Freeze the mixture until solid, at least 3 hours.
- Meanwhile, in a food processor, combine the mint leaves, sugar, rum and lime juice and puree. Refrigerate the mojito.
- About 30 minutes before serving, transfer the granite to the refrigerator to soften. Cut each mango half lengthwise into thin slices. Pour the mojito into shallow bowls. Fan out the mango slices in the bowls and top with large scoops of the granite. Garnish with the mint sprigs and serve.