Lightly grease a 9" pie pan and set aside. Preheat the oven to 325F.
In a stand mixer, crush the graham crackers until it resembles fine sand. Add the salt and melted butter. Mix until well combined. Pour the mixture into the pie pan. Use a cup measure to help evenly press the graham crackers into the pie pan. Bake the crust for 8 minutes until very fragrant and a slightly darker golden brown.
Meanwhile, combine all the ingredients for the filling in a bowl. Mix until well combined. Pour the filling into the prebaked pie shell. Bake for another 10-15 minutes at 325F until just set.
Let it cool for 30 minutes and then refrigerate it for 3 hours. Before serving, place the heavy cream in a stand mixer fitted with a whisk attachment. Whisk on medium speed until bubbles start to form on top. Add the sugar and whisk until you get medium stiff peaks. Pipe a design around the pie or simply spread it on top to cover.