Place the lime and your sweetener of choice into your glass.
Muddle for about 1 minute to release the juice from the lime.
Clap the mint in your hands a few times to release the scent. Place it in the glass and press gently with the muddler 2-3 times.
Add non alcoholic rum (if using).
Top with sparkling water and ice. Stir.
Garnish with slices of lime or some extra mint and serve.
