1Wash rhubarb stalks thoroughly and cut into 1/2 inch pieces. Put into a large bowl.
Pour 2 3/4 cups of the sugar on top of the rhubarb and leave in refrigerator overnight. The sugar will draw water from the rhubarb.
Bring the rhubarb and sugar mixture to a boil in a saucepan or in the microwave. Cook for 10 minutes or until tender.
Meanwhile, mix the remaining 1/4 cup of sugar with the package of gelatine. When the rhubarb is cooked, remove from heat and add the gelatine while stirring until the gelatine is dissolved.