In Italy, this refreshing naturally-flavored ice is called granita. It is often served after a rich meal or in the midst of a hot day.
5 cups peeled and sliced Granny Smith apples
1 cup water
3/4 cup sugar
1/2 teaspoon finely grated lemon zest
1. In large saucepot, simmer apples, water, and sugar until apples are tender — about 20 minutes. In food processor or blender, puree mixture until smooth; stir in lemon zest.
2. Transfer mixture to 8- or 9-inch metal pan and freeze until almost solid. Return to food processor of blender and puree until chunks break up and mixture is fluffy. Refreeze until firm. Use as an ice drink or scoop like ice cream.