juice of 1 lime
2 tablespoons white sugar, or to taste
small handful mint leaves, plus extra sprig to serve
60ml white rum
soda water, to taste
1 cup ice cubes
Muddle the lime juice, sugar and mint leaves in a sturdy glass, Use a muddler to crush the mint and lime to release the mint oils and lime juice. Add 2 more lime wedges and the sugar, and muddle again to release the lime juice. Pour into a tall glass and add a handful of ice.
Pour over the rum and stir with a long-handled spoon. Top up with soda water. Stir, taste, and add more sugar if desired. garnish with mint and serve.