How to Make It
Pour the watermelon juice into an ice cube tray and freeze until solid, about 4 hours.
In a blender, pulse the watermelon ice cubes with chilled vodka, chilled Aperol, chilled fino sherry, fresh lemon juice, agave and crushed ice until smooth. Add more agave if desired.
Divide among 4 chilled glasses and garnish with thin watermelon wedges and black and white sesame seeds. Serve immediately.