Watermelon Granita is a refreshing and icy dessert made with fresh watermelon, sugar, and lemon juice. This granita has a light and fruity flavor that is perfect for hot summer days. The watermelon is blended until smooth, then mixed with a simple syrup made from sugar and lemon juice. The mixture is frozen and scraped with a fork to create a granular texture. Serve this homemade watermelon granita as a light and cooling dessert or as a palate cleanser between courses.