Combine and mix together sugar, cornstarch, sure-jell, salt in medium sauce pan.
Add puree and whisk over medium high heat; stirring constantly.
Bring to a boil, cook 2 minutes or until starch clears and thickens.
Transfer to large bowl and cool.
Add lemon juice and lemon zest.
Gently add berries and stir to coat.
Gently pour into prepared crust, turn berries so face side down and attractive.
Refrigerate for 2 hours and serve with in 6 hours.
Serve with light whip topping.