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Peach-Raspberry Slab Pie

A thin double-crust slab, baked in a rimmed sheet pan, is perfect for pie lovers who prefer a high crust-to-filling ratio. The pâte brisée crust is peppered with polka-dot cutouts made with a round pastry tip; you can try this technique on a double-crust pie in any shape, size, or flavor. For easy unmolding, line the baking sheet with parchment paper with a one-inch overhang on long sides before baking the pie.

Recipe information

  • Yield

    Makes one 15-by-10-inch tart

Ingredients

2 1/4 pounds peaches (about 9), peeled (see page 343), pitted, and cut into thin wedges
6 ounces (about 1 cup) raspberries
1 cup granulated sugar
1/4 cup cornstarch
1 tablespoon fresh lemon juice
1/8 teaspoon salt
All-purpose flour, for dusting
2 recipes Pâte Brisée (page 322; do not divide into disks)
1 large egg yolk, for egg wash
1 tablespoon heavy cream, for egg wash
Fine sanding sugar, for sprinkling

Preparation

  1. Step 1

    Preheat oven to 375°F, with rack in lower third. Gently toss peaches, raspberries, granulated sugar, cornstarch, lemon juice, and salt in a large bowl.

    Step 2

    On a lightly floured surface, roll out each disk of dough to a 16-by-12-inch rectangle, 1/8 inch thick. Transfer one rectangle to a 15-by-10-inch rimmed baking sheet. Trim excess dough to a 1/2-inch overhang. Transfer remaining rectangle to a parchment-lined baking sheet. Refrigerate or freeze both until firm, about 30 minutes.

    Step 3

    Pour fruit mixture into dough-lined baking sheet, and spread into an even layer. Cover with remaining rectangle of dough. Trim edges of top piece of dough to 1/2-inch overhang. Fold edges of top layer over edges of bottom layer, and pinch to seal.

    Step 4

    Working in rows, cut about 60 holes from top crust using a 9/16-inch plain tip (such as Ateco #807), spacing evenly. Whisk together yolk and cream in a small bowl. Brush crust with egg wash. Sprinkle with sanding sugar.

    Step 5

    Bake until crust turns golden and filling is bubbling, about 90 minutes. (Tent with foil if crust is browning too quickly.) Let cool completely on a wire rack, about 3 hours, before cutting and serving.

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