Ingredients

6 cups chopped fresh or frozen rhubarb, thawed7 cups water, divided2 cups sugar3/4 cup thawed orange juice concentrate3/4 cup thawed lemonade concentrate10 cups club soda, chilled

Preparation

In a large saucepan, bring rhubarb and 4 cups water to a boil. Reduce heat; simmer, uncovered, for 5-8 minutes or until rhubarb is tender. Mash rhubarb; strain. Reserve juice and discard pulp. Add sugar, concentrates and remaining water to rhubarb juice. Transfer to a freezer container and freeze.

Remove from the freezer 30-45 minutes before serving, scraping the surface as it thaws. Place equal amounts of slush mixture and club soda in each serving glass. Serve immediately.