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Stir boiling water into the dry gelatin; mix in a big bowl for 2 minutes. Add enough ice to the cold water to make 1 cup; add to the gelatin and stir until thickened. Remove any unmelted ice. Add whipped topping; stir with wire whisk until well blended. Refrigerate for 20 minutes. Spoon into crust.
Refrigerate for 6 hours or overnight
added by Tammy Amina