Place lime juice, grapefruit juice and sugar into a pitcher and stir until sugar has dissolved. Add pomegranate juice, vodka and ice. Stir until chilled. Strain into martini glasses. Garnish with rosemary sprigs and cranberries.
Tip: This recipe can be multiplied for larger amounts. Triple the recipe and chill without the ice in an 8-cup pitcher.
Tip: Assemble this recipe the day before. Omit the ice and refrigerate until ready to serve.
Tip: The pomegranate juice can be replaced with unsweetened cranberry juice or your favorite sweetened cranberry juice cocktail. If using sweetened juice don’t add the sugar.