INGREDIENTS
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About 2 ounces pastry dough (if using frozen dough, toss it in the fridge the day before to thaw)
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Flour, for the work surface
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Butter, for the pastry dough
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1 large egg
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1/4 to 1/3 cup heavy cream
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1/4 teaspoon salt
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A sprinkling freshly grated nutmeg
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About 1 1/2 slices prosciutto or ham, torn into small bits, or 2 slices bacon, cooked and crumbled