Add watermelon chunks, lemon juice, sugar, and ½ cup of the rosé to food processor or blender. For extra lemon flavor, you can also add the lemon zest.
Cover food processor and pulse a few times until the watermelon breaks down a bit then add remaining rosé wine.This step prevents a lot of splatter that I find happens when I add all of the rosé at once.
Run food processor on low for about 30 seconds or until mixture is smooth and free of any large watermelon chunks. Small watermelon chunks are ok.
Pour mixture into freezer-safe dish and freeze for at least two hours.
Once frozen, scrape a spoon or fork across the surface of the frozen mixture to get the little signature granita curls. Scoop them into a glass or bowl to serve and eat with a spoon.
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Notes
PreparationYou can prepare granita up to one week in advance as long as it's stored correctly.SubstitutionsYou can also make this recipe with other melon varieties like cantaloupe or honey dew either instead of watermelon or in addition! Seeded or seedless. And fresh or frozen work equally well, by the way.Mix in other fruits, herbs, and spices to change up the taste to your preference. Strawberry, ginger, and mint are great additions!I use lemon in this recipe but you could also use grapefruit, lime, or orange. Fresh is best but bottled juice from concentrate also works!Feel free to swap in other sweeteners for granulated sugar, including coconut sugar, honey, agave nectar, and your favorite zero sugar options like stevia.ServingMy favorite hands-off method for serving is to set out the whole container of granita with several spoons and let everyone shave off what they want.StorageStore in the freezer in an airtight container until ready to enjoy and do the same with leftovers. Note that you can refreeze melted granita!