Cube the watermelon and remove any seeds if necessary.
Add the watermelon, sugar, and lime juice to a blender or food processor.
Use a blender for a smoother consistency, a food processor can work, but it may result in a coarser texture.
Taste the mixture and adjust the sweetness by adding more sugar, if desired.
Pour the mixture into a freezer-safe container and spread it evenly.
Place the container in the freezer for about 2 hours.
Serve immediately after freezing for the smoothest texture, or chill the mixture separately before freezing to avoid excess moisture.
Stir the sorbet every 30 minutes during the freezing process to help prevent ice crystals and ensure smoothness.
Return the sorbet to the freezer for an additional 2 hours, or until firm.
When ready to serve, scoop the sorbet into bowls or cones.
Garnish with fresh mint leaves for a burst of color and flavor.