Begin by cutting your seedless watermelon into manageable chunks, discarding any seeds you come across.

Add the watermelon chunks to a blender along with freshly squeezed lime juice and ice cubes. Blend on high for about 30-45 seconds.

Pause the blender and scrape down the sides, then continue blending until a smooth and frosty consistency is achieved.

Taste the slush and adjust the lime juice to your liking; blend briefly if needed.

Pour into chilled glasses and garnish with fresh mint leaves or a lime slice if desired.