01 -
Cut the watermelon into cubes and chill until very cold. For a slushier drink, freeze 1 cup of the cubes for 30-60 minutes.
02 -
Add the watermelon, lime juice, mint leaves, agave, and salt to a blender. Blend for 30-45 seconds, until smooth and bright pink.
03 -
Pour the mixture through a fine-mesh sieve into a pitcher for a smoother drink. Press gently, then discard the pulp or leave it unstrained for more texture.
04 -
Add ice to 4 tall glasses. Pour the watermelon base into each glass until about two-thirds full.
05 -
Top each glass with cold sparkling water and stir gently once or twice. Garnish with mint sprigs, lime wheels, and small watermelon wedges. Serve right away.