Ingredients

8 Cup chopped rhubarb
2 Quart water
3 Cup sugar
1/2 Cup lemon juice
1 small package raspberry Jell-O
7-Up

Instructions

Cook rhubarb, water and sugar until mushy; strain keeping the juice. Add lemon juice and Jell-O and stir until dissolved. Freeze. When serving, use 1/2 slush and 1/2 7-Up.