Ingredients

Steps

• Combine sugar, lime rind, lime juice, lemongrass, and 150ml water in a pan.
• Heat gently while stirring until the sugar completely dissolves.
• Simmer the mixture for 5 minutes and then let it cool completely.
• Strain the liquid into a container and stir in the vodka and soda water.
• Freeze for 2 hours until the mixture is almost firm.
• Break the mixture into flaky crystals using a fork.