1 9-inch single crust made with Good for Almost Everything Pie Dough (see recipe below), partially baked and cooled, or one 9-inch tart shell made with Dorie's tart shell
2 cups (canned) unsweetened pumpkin puree
3 large eggs, at room temperature
1 cup (packed) light brown sugar
2 tablespoons unsalted butter, melted and cooled
1 1/2 cups heavy cream
1/3 cup sour cream
1 1/2 teaspoons ground cinnamon
1 1/2 teaspoons ground ginger
Pinch of ground cloves
Pinch of freshly grated nutmeg
Pinch of salt
3 tablespoons dark rum
2 teaspoons pure vanilla extract
Lightly sweetened lightly whipped cream, for topping
1 1/2 cups all-purpose flour
2 tablespoons sugar
3/4 teaspoon salt
1 1/4 sticks very cold (frozen is fine) unsalted butter, cut into tablespoon-size pieces
2 1/2 tablespoons very cold (frozen is even better) vegetable shortening (non-trans fat), cut into 2 pieces
About 1/4 cup ice water