"A plum blueberry balsamic pie made with delicious summer stone fruit and the flakiest all-butter crust...."
INGREDIENTS
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2½ cups all purpose flour
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1 tsp sugar
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1 tsp kosher salt
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1 cup unsalted European-style butter, cut into ½-inch cubes
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½ cup ice
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1 cup ice water
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2 tbsp apple cider vinegar
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¼ cup turbinado sugar
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¼ cup packed dark brown sugar
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2 tsp balsamic vinegar
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⅛ tsp freshly ground black pepper
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¼ tsp kosher salt
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1¼ lb blueberries
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1¾ lb plums or pluots, pitted and sliced
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¼ cup tapioca pearls
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2 tbsp unsalted butter, cubed and chilled
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1 large egg, beaten
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1 tbsp granulated sugar
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1 tbsp turbinado sugar