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1
For the crust: Pulse the flour, granulated sugar and salt in a food processor.
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2
Add a third of the butter and process until combined.
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3
Add the remaining butter and pulse until the mixture resembles coarse meal, about 3 times.
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4
Add the vinegar and pulse again twice.
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5
Gradually pour in 1/3 cup ice water, pulsing about 4 times until combined.
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6
Turn onto a clean surface and press into a cohesive dough without overworking (you should see bits of butter).
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7
Wrap the dough in plastic wrap and press into a 1-inch-thick disk.
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8
Refrigerate at least 1 hour before rolling out.
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9
For the filling: Simmer 3 cups of the blueberries with 1/2 cup of the light brown sugar and 2 tablespoons water until the mixture reduces by half, about 20 minutes.
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10
Pour into a bowl and stir in the remaining 4 cups blueberries, the remaining 1/2 cup light brown sugar, the tapioca, sambuca, lemon juice, vanilla, cinnamon and salt.
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11
Let cool completely.
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12
For the assembly: Divide the chilled dough in half and put 1 piece back in the refrigerator.
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13
Roll the other piece into a 12-inch-round, 1/8-inch-thick circle on a lightly floured surface.
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14
Roll the dough onto a rolling pin, then unroll it into a 9-inch glass pie plate, letting it hang over the edge.
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15
Add the filling and dot the top with the butter.
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16
Roll out the other piece of dough and place over the filling.
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17
Press the crust edges together and trim, leaving a 1-inch overhang.
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18
Roll up or pinch the overhang to seal.
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19
Wrap an oiled, wide band of foil around the pie edge to protect the crust.
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20
Make 5 small slashes in the top of the crust from the center out, to make a star (similar to a star anise).
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21
Chill for 30 minutes.
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22
Place a foil-lined baking sheet on a rack in the lower third of the oven and preheat to 450 degrees F.
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23
When the pie is chilled, reduce the oven temperature to 400 degrees F, put the pie on the baking sheet and bake for 30 minutes.
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24
Remove the foil band and continue to bake until golden brown, about 30 minutes.
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25
Cool completely before slicing.
