In a food processor, combine the flour, salt and sugar.
Add cold butter, and pulse to incorporate the butter.
Add cold water and vinegar to the food processor.
Pulse to create a sandy textured dough.
Remove the dough from the food processor and shape into a square.
Wrap the dough in plastic wrap and refrigerate for 30 minutes.
Remove the dough from the refrigerator, dust a work surface with flour and roll the pie dough out to a 12-14 inch circle.
Gently lay the pie dough into the 9 inch pie plate. Shape the edges and poke holes in the bottom of the dough with a fork. Place the pie plate in the freezer while preparing the pie filling.
Preheat the oven to 375β.
In a large mixing bowl, combine pumpkin puree, sugar, brown sugar, vanilla, pumpkin pie spice, sea salt, eggs, and heavy cream.
Once the oven is preheated, remove the pie dough from the freezer and pour in the pie filling.
Place the pie plate on the center rack and bake for 55 minutes or until the internal temperature of the middle of the pie is 180β.
Cool the pie on a wire rack for at least one hour before cutting. Serve with fresh whipped cream.