Canned pumpkin purée is quick and easy to use. Don't substitute fresh pumpkin purée in this pie; it will be too watery.
On a lightly floured surface, roll out pate brisee to a 13-inch round, about 1/8 inch thick. Fit into a 9-inch pie dish. Trim edge, leaving a 1-inch overhang: fold edge under and crimp as desired. Refrigerate 30 minutes.
Preheat oven to 375 degrees. Line crust with parchment and fill with pie weights or dried beans; bake until crust is set, 30 to 35 minutes. Remove pie weights and parchment, and continue to bake until bottom of crust is lightly browned, about 10 minutes. Remove from oven and let cool slightly. Brush crust with egg white; let cool on a wire rack.
In a large bowl, whisk together eggs, pumpkin, evaporated milk, brown sugar, cornstarch, vanilla, cinnamon, ginger, 1/2 teaspoon salt, and nutmeg.
Reduce oven temperature to 325 degrees. Pour pumpkin mixture into cooled crust. Bake until center is set but slightly wobbly, 50 to 55 minutes. Let cool completely on a wire rack. Refrigerate until chilled, at least 6 hours and preferably overnight. Slice and serve with whipped cream, if desired.