In a pitcher, muddle the blueberries, lemons, and simple syrup until the lemons release their oils and about half of the blueberries are smashed. (If you don’t have a large muddler, a big wooden spoon works great!). Stir in the vodka. Cover and place in the fridge until you are ready to serve (the longer it sits, the more the flavors will infuse).

Right before serving, stir in the sparkling lemon water (or lemon Italian soda). Pour over ice and garnish with lemons and sprigs of rosemary. Tip: I like to twist the rosemary a bit to release their oils. This will make 8 small drinks or 4 big ones!