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In a small bowl, add the salt to the water and stir to dissolve. Keep in the refrigerator until ready to use.
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Place the flour in the bowl of a food processor. Cut the butter into 1-inch pieces and scatter the pieces over the flour. Pulse briefly until the mixture forms large crumbs, there should still be small pieces of butter visible.
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Add the water mixture and pulse for several seconds until the dough starts to become a ball, but isn’t fully smooth.
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Place the dough on a lightly floured work surface and shape into a disk about 1-inch thick. Wrap in plastic wrap and chill for at least 2 hours and up to overnight.
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Once dough is chilled, place it on a lightly floured surface and roll it out to about 1/8 inch thick. Lift and rotate the dough every so often to prevent it from sticking.
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Once rolled out, cut out 4 circles about 2 inches larger than the pie dishes, re-combining and re-rolling the dough if needed.
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Carefully transfer the dough to the pie dishes, pressing them gently into place with your fingers. Trim the dough even with the rim of the pan with a sharp knife.
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Chill the shell until firm, about 30 minutes.
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Preheat the oven to 375°Line the pastry crusts with parchment paper and fill with pie weights. If you don’t have pie weights, you can use rice or popcorn kernels.
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Bake the crusts until the surface looks light brown, about 15 minutes. Remove from the oven and remove the weights and paper. Return the crusts to the oven and bake until golden brown, about 5 minutes longer.
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Let the crusts cool completely on wire racks before filling.