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1
On a piece of parchment generously dusted with flour, roll out one disk of dough to a 12-inch round.
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2
With a dry pastry brush, sweep off excess flour; fit dough into a 9-inch glass pie plate, pressing it into the edges.
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3
Trim dough to a 1/2-inch overhang all around.
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4
Roll out remaining disk of dough in the same manner; transfer (on parchment) to a baking sheet.
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5
Chill pie shell and dough until firm, about 30 minutes.
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6
In a large bowl, toss together peaches, apricots, and cherries.
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7
Add the granulated sugar, cornstarch, salt, and lemon juice; toss to combine.
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8
Remove baking sheet from the refrigerator; transfer dough to a clean work surface.
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9
Using a pastry cutter (preferably fluted) or sharp knife, cut dough into 3/4- to 1-inch-wide strips.
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10
Spoon the fruit mixture and any juices into the chilled pie shell, mounding fruit slightly in the center.
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11
Dot with butter.
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12
Brush the rim of the pie shell with water.
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13
Weave a tight lattice of dough strips on top of the fruit.
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14
Using kitchen scissors, trim dough strips to a 1/2-inch overhang; gently press top and bottom pieces together to seal.
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15
Fold edges over or under, and crimp edge as desired.
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16
In a small bowl, whisk together egg yolk and cream; brush on lattice and edge of pie shell, being careful not to let it pool.
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17
(If you have any scraps of dough, cut out some pretty shapes to place on top of lattice; adhere them with egg wash.) Generously sprinkle entire surface with sanding sugar.
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18
Freeze or refrigerate pie until firm, about 30 minutes.
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19
Meanwhile, preheat the oven to 400F, with the rack in the lower third.
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20
Place pie on a parchment-lined baking sheet.
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21
Bake until the crust begins to turn golden, about 20 minutes.
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22
Reduce oven temperature to 350F.
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23
Continue baking, rotating sheet halfway through, until the crust is deep golden brown and the juices are bubbling and have thickened, 40 to 50 minutes more.
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24
Transfer to a wire rack to cool completely.
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25
The pie is best eaten the same day it is baked, but it can be kept at room temperature, loosely covered with plastic wrap, for up to 2 days.