12 c. rhubarb, sliced
9 c. water
2 c. sugar
1 sm. box sugar-free raspberry gelatin
1 (6 oz.) can lemonade
1 c. liquor (optional)
7-Up

Simmer rhubarb, water and sugar 1/2 hour after mixture begins boiling. Run through colander. Add sugar-free gelatin, frozen lemonade and liquor, if desired. Freeze.

To serve, mix 2/3 cup slush to 1/3 cup 7-Up. Keeps long time in freezer.