Strain the cocktail into two glasses. A coupe glass is ideal for serving it neat - without ice. Otherwise, divide between two low-ball glasses filled with ice. Top off with club soda as desired.
2-4 ounces club soda
Garnish with fresh thyme or rosemary (or lavender!), a slice of lemon, or fresh blueberries as desired. Enjoy responsibly!
Notes
Blueberry Lavender Syrup: Bring 1 cup bluberries, 1 cup water, 1 cup granulated sugar, and 2 TBSP dried lavender flowers to a boil for 5 minutes. Remove from heat and let sit for 10 minutes. Strain and cool before using in a cocktail. Please see the full recipe linked above for additional details.