Preheat oven to 350F.
In a bowl, combine graham cracker crumbs, butter and sugar. Mix with a spatula to combine.
Spread evenly on the bottom and sides of a pie dish (8 or 9 -inch pie pan).
Bake for 8-10 minutes, until golden.
In a bowl, combine all ingredients for the filling. Mix well. You can use an electric mixer.
If the mixture does not appear smooth, strain through a fine mesh sieve.
Pour over the crust. Bake for 15-20 minutes, until set.
Remove from the oven an cool to room temperature. Then refrigerate for 1 hour. Serve with or without the whipped topping.
Using an electric mixer, beat heavy cream, vanilla and sugar together until stiff peaks. Lifting the whisk, the peaks should hold their shape. (Time may vary, depending on the type of cream and mixer used. It is anywhere between 2 and 5 minutes)