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Preheat your oven to 425°F.
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Divide the pastry into two pieces, one slightly larger than the other. Roll the larger piece of pastry into a 12" to 13" circle, and place it in a 9" pie pan.
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To make the filling: In a medium saucepan, cook the cranberries with the sugar, zest, 1 tablespoon of flour, and juice until the mixture is slightly thickened.
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Sprinkle half the pecans into the crust in the pan.
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In a medium bowl, mix the apples with the remaining 1 tablespoon flour, the cinnamon, and the boiled cider, if using. Transfer to the pan and dot with the butter.
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Pour the cranberry mixture over the apples and sprinkle with the remaining pecans.
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Roll the second piece of pastry into an 11" circle. Use the pastry to weave a lattice top crust. (Alternatively, leave the pastry whole and use it to make a classic-looking double-crust pie.)
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Bake the pie for 40 to 45 minutes, covering with foil if the pastry is browning too quickly, or until the crust is golden and the berries are bubbly.
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Remove the pie from the oven and allow it to cool before slicing.
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Store, loosely covered, at room temperature for a day, or refrigerate for up to 5 days. Freeze for up to three months.