INGREDIENTS
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1 1/4 cups all-purpose flour
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1/2 cup, plus 3 tablespoons sugar
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Kosher salt
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6 tablespoons (3/4 stick) cold unsalted butter, diced
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2 tablespoons cold vegetable shortening, (recommended: Crisco)
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1/4 cup ice water
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4 extra-large egg whites, at room temperature
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1/4 teaspoon cream of tartar
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Lime Filling, recipe follows
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1/4 pound (1 stick) unsalted butter, at room temperature
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1 1/2 cups sugar
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4 extra-large eggs
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1/4 cup finely grated lime zest (6 to 8 limes)
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1/2 cup freshly squeezed lime juice
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1/8 teaspoon kosher salt