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["Sift together the flour, baking powder, salt, and sugar into a large bowl.", "In a separate bowl, mix together egg, vinegar, and water.", "With a pastry cutter or fork, begin to cut the fats into the flour, then stir in the egg mixture. Continue to cut in the fats until the dough is shaggy and holds together when you gently squeeze a handful.", "Dump out dough onto a pastry board and fold a few times until all of the dough just begins to come together.", "Divide in half and wrap each tightly in plastic wrap and refrigerate for a few hours or up to a few days.", "Prepare enough pie dough for a single-crust 9-inch pie, refrigerate for at least 1 hour or overnight.", "In a saucepan over medium heat, bring vinegar, water, brown sugar, star anise, cinnamon stick, rosemary sprig, ginger, pepper, cardamom, and salt to a simmer, stirring to help dissolve sugar.", "Add 1/3 of plums and simmer until thickened and jammy, stirring frequently, 20 to 30 minutes. Cool, then discard star anise, cinnamon stick and rosemary.", "Toss remaining 2/3 plums, granulated sugar, honey, orange zest and tapioca in a bowl and set aside. (If your plums are tart, add more sugar to taste.)", "Heat brandy and orange juice in a small pan until just simmering and pour over dried fruit. Let cool, stirring occasionally.", "Mix chopped plums, cooked plum chutney from step 3, reconstituted fruit and any remaining liquid, set aside.", "Roll out pie dough to fit a 9"" pie tin. Lightly grease and flour tin, transfer dough to tin, and crimp edge. Refrigerate for at least 20 minutes.", "Prepare the crumb topping by combining flour, brown sugar, walnuts, cinnamon, cloves, and salt. Using your hands, work in butter until the dry ingredients are completely incorporated into butter and large, marble-size clumps form when pinched. Refrigerate until ready to use.", "Preheat oven to 400 degrees.", "Line pie crust with parchment paper and fill with pie weights or beans. Bake for 18 minutes. Remove weights and paper, and bake another 5 to 10 minutes. Transfer to a rack to cool slightly.", "Pour plum filling into crust and top with crumble.", "Turn oven down to 350 degrees and place pie on a baking sheet on middle rack in oven. Bake for 60 to 90 minutes, or until fruit bubbles up and top is golden brown."]