Method
- If using, rim a glass with kosher salt by rubbing a lime wedge around the edge and dipping it into the salt.
- Fill the glass with ice.
- In a shaker, combine Serpentes Reposado, grapefruit juice, lime juice, and simple syrup.
- Shake well until chilled.
- Strain the mixture into the prepared glass.
- Top with club soda and stir gently.
- Garnish with a grapefruit slice or lime wedge, if desired.