INGREDIENTS
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For the crust
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6-3/4 ounces (1-1/2 cups) unbleached all-purpose flour, more for rolling
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1 tablespoon granulated sugar
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1/2 teaspoon table salt
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5-1/2 ounces. (11 tablespoons) unsalted butter, chilled and cut into 1/2-inch dice
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1 large egg yolk
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3 tablespoons whole milk
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For the filling
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1 pound peaches, peeled and cut into 1/2-inch slices (about 2 cups)
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3/4 pound blueberries, rinsed and picked through (about 2 cups)
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1/4 cup light muscovado sugar or light brown sugar
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2 teaspoon unbleached all-purpose flour
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1/4 teaspoons ground cinnamon
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Pinch of table salt
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1 large egg, beaten
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2 teaspoons demerara sugar