For Rosemary-Green Tea Granita, substitute green tea for the red zesty tea, pineapple juice for the cranberry juice and a rosemary sprig for the cinnamon stick.
If you don't want the hassle of stirring every 30 minutes, stir granita after 2 hours, then cover and freeze 3 hours or overnight. To serve, scrape surface of granita with fork and spoon into glasses.
Garnish with festive kiwifruit stars. To easily make the stars, cut slices of kiwifruit with a small, deep star-shaped cookie cutter.