1Combine 1 package pie filling mix, 1/4 cup of the milk, the pureed berries and cinnamon in saucepan. Cook and stir until mixture comes to a full boil. Pour into crust;chill.
2Prepare remaining package pie filling mix with remaining milk as directed on package for pie. Add 1 teaspoon of the lemon rind; pour into bowl and cover with plastic wrap. Chill about 1 hour, until cold.
3Fold in 1 cup of the whipped topping and spoon over blueberry layer. Combine remaining whipped topping and lemon rind. Spoon over filling. Freeze 1 hour or chill in refrigerator 3 hours before serving Garnish with blueberrries if desired.