Making Watermelon Lime Granita is straightforward. Follow these easy steps to create your icy masterpiece:

1. Prepare Watermelon: Chop the seedless watermelon into chunks and place them into a blender or food processor.
2. Blend Until Smooth: Blend the watermelon chunks until you achieve a smooth puree.
3. Add Lime Juice and Sugar: Pour in the fresh lime juice and sugar. Blend again until fully combined. Taste the mixture and adjust sugar if desired.
4. Add Lime Zest (Optional): For an extra zesty kick, mix in lime zest and blend briefly to combine.
5. Transfer to Container: Pour the watermelon-lime mixture into a shallow container or a baking dish.
6. Freeze: Place the container in the freezer. After 1 hour, take it out and use a fork to scrape the mixture gently to break up any ice crystals.
7. Continue Freezing: Return the granita to the freezer for another 3 hours, scraping with a fork every hour to maintain a fluffy texture.
8. Serve: Once fully frozen and fluffy, scoop the granita into serving glasses or bowls.

These steps guarantee the perfect consistency and flavor for your Watermelon Lime Granita.