Steps
1. In a blender, puree the watermelon cubes until smooth.
2. Strain the watermelon puree through a fine mesh sieve into a glass to remove any pulp.
3. Add the lime juice to the watermelon juice and mix well.
4. Fill a glass with ice cubes, then pour the watermelon juice over the ice.
5. Slowly add the light beer, stirring gently to combine.
6. Garnish with fresh mint leaves and enjoy!