wikipedia says). It was super easy to make, with the exception of having to grate lime zest for a loooong time... with a paper cut. Lime juice and paper cuts... Humperdink! Humperdink! Humperdink! Here's the recipe:
32 oz. water
1 lb. sugar
1 oz. lime zest (not the white fleshy part)
4 oz. lime juice
Mix together all ingredients and freeze until firm, stirring every 30 minutes. To serve, use an ice cream scoop to make balls.
Granita is good by itself, but fantastic also in a glass of lemonade or other summer beverage.