Rhubarb Chiffon Pie

2 cups cooked rhubarb, chopped
1 cup granulated sugar
1 small box red gelatin (any flavor)
6 ounces whipped cream
Graham cracker crust or baked pie shell

Mix hot rhubarb, sugar and gelatin together. Let cool. Fold in the whipped topping. Pour inot a graham cracker crust or a pie shell. Chill.