On a floured surface, roll out the dough to a 12-inch circle, give the dough a quarter-turn after every few rolls to keep it even. Carefully place the dough into a 9-inch pie dish. Tuck and pat it in place, making sure it is smooth. Crimp or flute the edges.
Make egg wash by whisking together egg and milk. Lightly brush edges of the pie crust with egg wash. Chill the crust in the fridge for 20 minutes.
Preheat oven to 375 F and prepare to parbake the crust.
After you've chilled your shaped pie crust, crumple up a 12-inch square of parchment paper and line the chilled pie crust with it. Fill with 1 pound of ceramic pie weights or dried beans. Bake the crust for 10 minutes.
Carefully lift the parchment paper with the pie weights from the crust. Prick the bottom of the crust all over with a fork to create steam vents and return the crust, without weights, to the oven to bake for an additional 8 minutes, or until the bottom is just beginning to brown. Remove from the oven and let rest while making the filling.
In a large bowl, whisk the pumpkin, brown sugar and eggs. Add cream, milk, maple syrup, cornstarch, cinnamon, sugar, salt, nutmeg, pepper, and cloves. Whisk vigorously until everything is smooth and combined. The filling should be a creamy pourable consistency. Pour the filling into the warm crust.
Bake for 25 minutes. Add a pie crust shield to prevent burning the edges and continue baking for another 30-35 minutes or until the centre is about set. A small part of the centre will be wobbly when it's done. Cool the pie on a cooling rack for at least 3 hours before slicing.
Serve with whipped cream or vanilla ice cream.