Refreshing and light, this dessert is a great finish to a patio supper in the summer or a palate cleanser in between courses.
Bring grapefruit juice and sugar up to a simmer and stir until sugar is dissolved. Remove from heat and cool. Puree grapefruit syrup with watermelon and strain. Stir in vodka and freeze. After an hour, stir granita, and then stir 2 more times before frozen.
To serve scrape up granita granules with a fork and spoon into dessert glasses or shooter glasses.
Yield: 2 Cups