Prepare Watermelon:
Chop seedless watermelon into small chunks and freeze for at least 4 hours or overnight until solid.

Blend:
Place frozen watermelon chunks and lime juice in a high-speed blender or food processor.

Process:
Blend until smooth and creamy, scraping down the sides if needed. Add a splash of water only if absolutely necessary to help blend.

Serve Immediately:
Enjoy soft-serve style right away or freeze in a container for 30–60 minutes if you prefer a firmer texture.