In a large bowl, whisk together the pumpkin, brown sugar, granulated sugar, cinnamon, ginger, nutmeg, salt, orange zest, eggs, cream, milk, and rum.
Pour the filling into the baked pie shell.
Bake for 55 to 65 minutes, until the filling is just set in the middle and knife inserted in the center comes out clean.
Set aside to cool completely.
Place extra leaves on the center of the pie and serve with whipped cream.