Blushing Greyhound Sorbet

To make a sorbet, combine 2 cups grapefruit juice, 3½ tablespoons grenadine, and 1 cup Simple Syrup and freeze the mixture overnight. Make sure to scrape it periodically with a fork to prevent it from becoming one solid block. Otherwise, pour the mixture into ice cube trays, freeze overnight, and then process in a food processor. Alternatively, use a sorbet ma