INGREDIENTS
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For the tart dough
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1 1/4 cups all-purpose flour, plus more for the work surface
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1/8 teaspoon salt
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2 teaspoons granulated sugar
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7 tablespoons cold unsalted butter, cut into chunks
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3 tablespoons ice water
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For the filling
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1 to 2 tablespoons sugar, plus more for sprinkling
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1 teaspoon cornstarch
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4 to 5 white peaches, peeled, pitted, and cut into 1-inch slices (4 to 5 cups sliced peaches)
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1 tablespoon fresh lemon juice
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1/2 teaspoon vanilla extract
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1 large egg, lightly beaten