2 ounces light rum
1 ounce lime juice
2 teaspoons sugar
Mint
Soda Water

Place sugar, a large pinch (small handful) of mint, and a splash of soda water in a pint glass. Use a muddler to lightly press mint and dissolve sugar until it smells of spearmint gum. Squeeze both halves of lime into the glass, leaving one hull in the mixture. Add rum, stir, and fill with ice. Top with soda water, garnish with mint sprig and serve.