1/4 cup gin (I recommend either Bombay Sapphire or Tanqueray to highlight the woodsy features of the gin. I don’t recommend Hendricks, which is my favorite gin, as it’s flavored with cucumbers and rose petals and will thus change the tasting notes of the drink.)
2 tablespoons fresh lemon juice
1 tablespoon Rosemary Syrup (see below)
Ice cubes
Cold club soda
1 rosemary sprig and fresh red currants, for garnish

Ingredients:
2 cups water
1/2 cup sugar
4 rosemary sprigs, rinsed