In a large blender add half the strawberries and half the water and blend until pureed.
Fold in the remaining strawberries and water, add the sugar and lemon juice and blend until creamy and well combined.
Transfer the granita mixture into a large metal container ( it will shorten freezing times than using a plastic one) cover, and transfer in the freezer.
Refrigerate for half an hour, then stir vigorously the mixture to break any ice crystals.
Repeat every 30 minutes, for 2-3 times, or until your granita has reached a velvety sorbet-like texture. Alternatively, you can blend the mixture with a hand blender every 45 min.
For the ice cream maker version:
Follow step 1.
Transfer the granita mixture into a cooled ice cream maker bucket.
Start the machine and allow it to work the mixture for 30 min or until it reaches a creamy sorbet-like icy texture.
Once ready, it's best to eat your granita straight away.