Start by making the pie dough unless you are using a store-bought crust. In a food processor, add the flour, sugar, and salt, and mix until combined. Add cold cubed butter and blend until the butter and the flour mixture are combined.
Add ice water and mix for 10 seconds. Press the dough between your fingertips and if the dough comes together, it’s ready. If not, add another tablespoon of water.
Transfer the dough to a clean floured surface and gather the dough into a disk. Cover the dough disk with plastic wrap, and place it in the fridge for at least an hour.
Remove the dough disk from the fridge and roll the dough on a lightly floured surface with a rolling pin into an 11-inch circle. Line the pan with the dough. Trim off excess dough fold the ends under and crimp the edges as desired. Poke the bottom with a fork and freeze for 20 minutes.
Meanwhile, make the pumpkin pie filling. In a large mixing bowl, add the pumpkin puree, sweetened condensed milk, eggs, egg yolk, salt, vanilla extract, cinnamon, nutmeg, ginger, and pumpkin spice, and mix with a whisk until well combined.
Remove the unbaked pie crust from the fridge and line the inside of the dough with parchment paper. Fill it with dried beans or pie weights. Bake for 20 minutes at 180c (350f) preheated oven. Carefully lift the parchment paper and pie weights and set them aside to cool.
Brush the crust with egg wash and pour the pumpkin pie filling into the crust.
Bake in a 180c (350f) preheated oven in the third lower rack of the oven for 40-50 minutes or until the edges of the pie are fully set, and the middle seems jiggly.
Allow the pie to cool to room temperature for at least an hour, and let it set in the fridge for at least 4 hours. Overnight is best.