Preheat oven to 425F.
In a large bowl, combine all of the ingredients for the pie filling.
Pour the filling into a pre-made pie Graham cracker pie crust, store-bought of homemade. Do not overfill. Depending on the size of your pan/crust, you may have some filling left over.
Bake at 425F on a middle rack for 25-30 minutes, until the sides of the pie set and the middle is still a little jiggly (see note). Cool in warm place to avoid the pie developing cracks.
While the pie is cooling down, whip the whipping cream in a medium bowl using an electric mixer or a hand whisk.
Serve chilled topped with whipped cream and the remaining lime zest.