Place the cubed watermelon in a blender or food processor and blend until smooth.

Strain the watermelon puree through a fine mesh sieve to remove any pulp or remaining seeds, if desired.

In a mixing bowl, combine the strained watermelon puree, granulated sugar (or honey), lime juice, lime zest, and a pinch of salt. Stir well until the sugar is fully dissolved.

Pour the mixture into a shallow, freezer-safe container and cover with a lid or plastic wrap.

Place the container in the freezer and allow the sorbet to freeze for 4-6 hours, stirring every hour to break up ice crystals and create a smooth texture.

Once fully frozen and smooth, scoop the sorbet into serving bowls and garnish with additional lime zest or fresh mint leaves, if desired.