Make simple syrup: Bring water honey, and ginger to a simmer, let simmer for 5 minutes. Take off heat and set aside Let cool completely before using. Store in the fridge for up to 1 month.
Juice oranges and grapefruit and set aside. Cut additional orange, grapefruit, and lemon slices for garnish in the pitcher.
Place freshly squeezed juice, and fruit slices in pitcher.
Pour in sparkling water, hampagne or prosecco, vodka, cranberries, 3 sprigs of rosemary, and 2 cups of ice.
Once simple syrup is cooled, pour in 3/4 of a cup. Reserve remaining simple syrup for later use.
Stir well, garnish, and serve.