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1
MAKE THE PASTRY: In a large bowl, combine the flour and salt. With a pastry blender or two knives, cut the butter in until the mixture resembles coarse meal. Blend in the sour cream. Sprinkle on 1 tablespoon of the water and work it into the dough, adding up to 1 more tablespoon of water to form a dough that can be gathered into a ball. Pat the dough into a disc shape, wrap in plastic wrap, and refrigerate for at least 30 minutes.
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2
On a lightly floured surface, roll the dough into a 12-inch circle, then fit it into a 9-inch pie pan. Trim the overhang to an even 1/2-inch all the way around. fold the overhang over and crimp the dough to form a decorative border. Prick the bottom of the crust lightly with a fork. Refrigerate the pie shell for 30 minutes.
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3
Preheat the oven to 400 degrees. Line the pie shell with foil and fill with dried beans or pie weights. Bake for 8 minutes. Remove the foil and beans, and bake the pastry for 8 to 10 minutes longer, or until lightly golden. Remove the pie shell from the oven and reduce the the oven temperature to 375 degrees.
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4
MAKE THE FILLING: In a large skillet, cook the bacon over medium heat until crisp, about 10 minutes. Reserving the fat in the skillet, drain the bacon on paper towels; crumble and set aside.
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5
In the bacon fat, saute the onions over medium heat until softened but not browned, about 10 minutes.
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6
Meanwhile, in a medium bowl, whisk together the eggs, milk, sour cream, flour, nutmeg, and pepper.
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7
Spread the onions evenly over the bottom of the pie shell. Sprinkle the reserved bacon and the cheese evenly on top. Pour the custard mixture into the pie shell and bake for 20 minutes, or until the custard has set and the top is golden brown.
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8
Serve pie warm, garnished with the parsley.
