If you have a metal baking pan, use it; it will chill the mixture faster than a glass one. And remove the granita from the freezer when you scrape it--too much cold air will escape if you do this while the door's hanging open.
If you have a metal baking pan, use it; it will chill the mixture faster than a glass one. And remove the granita from the freezer when you scrape it--too much cold air will escape if you do this while the door's hanging open.