- 1 lime, halved crosswise
- 3 fresh mint sprigs
- 1 tablespoon sugar
- 2 tablespoons white rum
- 1/3 cup chilled sparkling water
- Squeeze juice from both lime halves into a 12-ounce highball glass, then add lime halves. Add mint and sugar and crush mint with back of a spoon until sugar is dissolved. Add rum and stir. Add ice, then top off drink with sparkling water and stir well.