INGREDIENTS
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3 unbaked nine-inch pie shells, at room temperature
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Juice of 1 lemon
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3 1/2 lb Granny Smith apples
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1 1/2 tsp vanilla extract
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1/4 cup granulated sugar
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1/2 cup light brown sugar
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1 1/2 tsp cinnamon
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1/4 cup flour
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1/8 tsp salt
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2 Tbsp chilled butter
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1 egg yolk
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2 Tbsp water