If using a homemade pie crust, roll the pie crust to a 14-inch circle. Line a 9-inch pie dish with the pie dough and crimp edges. Chill the crust until ready to use (see notes about blind baking). Position an oven rack in the bottom third, and preheat the oven to 400F. In a large mixing bowl, whisk together the sugar, spices, and salt. Add the pumpkin, milk, and eggs, and whisk until well combined. Pour into the pie shell. (You can brush the edges of the pie crust with an egg wash, if desired.) Bake for 15 minutes. Reduce the oven temperature to 350F. Continue baking until the filling is puffed and jiggles slightly in the center when gently shaken, about 40 minutes. Remove from the oven and let cool completely on a wire rack. If making ahead, cover and refrigerate for up to 2 days before serving.