Step 1: Combine first 4 ingredients in a large bowl. Cover and chill 8 hours. Remove orange; discard. Press berry mixture through a sieve over a bowl; discard solids. Combine berry mixture, juice, and sugar in an 8-inch dish, stirring until sugar dissolves. Cover and freeze 45 minutes. Stir berry mixture with a fork every 45 minutes until completely frozen and slushy (about 4 hours).
Step 2: Remove berry mixture from freezer; scrape the mixture with a fork until fluffy. Garnish with orange slices.
Calories: 132 (4% from fat), Fat:0.7g (sat 0.1g,mono 0.1g,poly 0.2g), Protein:1g, Carbohydrate:26.2g, Fiber:3.2g, Cholesterol:0.0mg, Iron:0.4mg, Sodium:4mg, Calcium: 31mg
Make enough to share with friends this Summer by serving in a pitcher over plenty of Party Ice.