1. Make the crust: In a food processor, pulse flour, granulated sugar, and salt until combined. Add butter and pulse until mixture resembles coarse meal, with a few pea-size pieces of butter remaining. Add 1/4 cup ice water in a steady stream, pulsing until dough is crumbly but holds together when squeezed (if necessary, add up to 1/4 cup more ice water, 1 tablespoon at a time). Form dough into a disk, wrap tightly in plastic, and refrigerate until firm, 1 hour (or up to 2 days).

2. Preheat oven to 400 degrees. On a lightly floured surface, roll out dough just over 1/8 inch thick. Transfer to a 9-inch springform pan, adjusting dough as needed to fit flat against bottom and sides. Trim dough, leaving a 1 1/2-inch overhang (reserve scraps); freeze 15 minutes. Line dough with a double layer of parchment and fill with pie weights or dried beans. Bake on a rimmed baking sheet 30 minutes. Carefully remove parchment and weights; use reserved scraps to patch any holes in crust. Bake until deep golden, 30 minutes; cover edge with foil if overbrowning.

3. Meanwhile, make filling: In a large bowl, whisk together brown sugar, salt, cinnamon, and nutmeg. Whisk in eggs, then pumpkin, until smooth. Slowly whisk in milk, cream, and vanilla. Reduce oven temperature to 350 degrees. With edge covered with foil, pour all but 1 cup filling into crust, return to oven, and carefully add remaining cup filling; bake 1 hour. Remove pie from oven and top with pecans. Bake until filling is just set but slightly wobbly in center, 20 to 25 minutes more. Let cool completely on a wire rack, about 3 hours. With a serrated knife, cut off overhang and unmold.