How to Make It
Combine first 5 ingredients in a blender; process until smooth.
Pour mixture into an 8-inch square glass or ceramic baking dish. Cover and freeze 2 1/2 hours, scraping with a fork every 30 minutes until mixture is fluffy.
Spoon orange mixture into 4 serving glasses. Top each with 1/4 cup sparkling water. Serve immediately.
Cooking Light Chill