1 small pkg. sugar-free strawberry Jell-O
2/3 c. boiling water
ice cubes
1/2 c. cold water
1 (18 oz.) tub Cool Whip, thawed
1 pie crust

Stir boiling water into Jell-O in bowl at least 2 minutes. Add enough ice to cold water to make 1 ; cup. Add Jell-O and stir until ice is melted. Add Cool Whip; stir with whisk until well blended. Refrigerate 15 to 20 minutes or until mixture is very thick and will mound. Spoon into crust. Refrigerate at least 4 hours or overnight.