Cantaloupe and Lime Granita

Serves four to six.
Ingredients:
6 cups pureed fresh cantaloupe, from about one medium melon
2 tablespoons lime juice, from about one lime
Zest from one lime
Directions:
Remove the rind from the cantaloupe. (You can cut off each end and then around the outside, like at the start of supreming citrus.) Cut the melon in half and scoop out the seeds. Roughly cut the fruit into about one inch pieces.