Spiced Christmas Margaritas

Combine the 4 cups of POM pomegranate juice, 3 cups of orange juice, 750 ml of tequila, 6 oz of orange liqueur, 2 tbsp of vanilla bean syrup (or vanilla bean paste), 1 tsp of ground ginger, and 1 tsp of ground cinnamon in a 1-gallon or larger pitcher/container. Stir well to combine all ingredients. When serving, pour the margarita mix into glasses, top with ginger beer, and garnish each glass with pomegranate seeds and a rosemary sprig.