Preheat your oven to 350°F (175°C). In a medium bowl, combine the graham cracker crumbs, granulated sugar, and melted butter.
Press the mixture evenly into the bottom and up the sides of a 9-inch pie dish.
Bake for 8-10 minutes until lightly golden. Remove from the oven and set aside.
In a large bowl, mash the roasted sweet potatoes until smooth. Add brown sugar, granulated sugar, eggs, heavy cream, melted butter, vanilla extract, cinnamon, nutmeg, ginger, and salt.
Mix until well combined.
Pour the sweet potato filling into the prepared graham cracker crust.
Smooth the top with a spatula.
Bake in the preheated oven for 50-60 minutes, or until the filling is set and a knife inserted into the center comes out clean. If the crust starts to brown too much, cover the edges with foil.
Let the pie cool completely before slicing. Serve as is or with a dollop of whipped cream.