01 -
Combine water, caster sugar, and lemon juice in a saucepan; stir on low heat until the sugar is fully dissolved.
02 -
Bring the mixture to a boil over high heat and boil for five minutes. Remove from heat and let it cool for 30 minutes.
03 -
Blend the cubed watermelon in a blender until smooth.
04 -
Strain the blended watermelon through a fine sieve into a large bowl to remove any pulp or seeds.
05 -
Mix the cooled sugar syrup with the strained watermelon juice until fully combined.
06 -
Refrigerate the mixture for two hours until thoroughly chilled.
07 -
Churn the chilled mixture in an ice cream machine according to the manufacturer’s instructions until firm.
08 -
Transfer the churned mixture to an airtight container and freeze until solid.