Makes one 9-inch pie

Crust:
2 1/3 cups all-purpose flour
½ cup whole wheat flour
2 tablespoons granulated sugar
¾ teaspoon salt
1 cup unsalted butter
2 teaspoons white vinegar
3 tablespoons ice-cold water

Peach Filling:
3 lbs fresh ripe peaches, halved, pitted and cut into 3/4-inch wedges
1 cup blueberries
¾ cup granulated sugar
1 teaspoons finely grated lemon zest
1 tablespoon freshly squeezed lemon juice
¼ teaspoon salt
3 tablespoons quick-cooking tapioca or corn starch
¼ teaspoon ground cinnamon

Garnish:
1 egg, whisked with 1 teaspoon water for egg wash
Demerara sugar for sprinkling

Make the pie dough:
1. Place the flours, sugar, and salt in the bowl of a food processor and pulse until blended. Add the butter cubes and, using a spoon, toss to coat them in flour. Pulse the machine on and off just until the mixture resembles coarse crumbs. In a small bowl, mix the vinegar with 3 tablespoons of the cold water. With the processor on, add the mixture through the feed tube and process until the mixture just starts to come together.
2. Turn the dough out onto a work surface, divide it in two, and shape each half into a thick disk. Wrap the disks in plastic wrap and chill for an hour.

Make the filling:
3. In a large bowl, toss the peaches and 1 cup of blueberries with the sugar, lemon zest, lemon juice, salt, tapioca or corn starch and cinnamon Cover the bowl and let stand at room temperature for 30 minutes to allow the peach juices to be released and absorbed by the tapioca.

Assemble the pie:
4. Lightly flour a large work surface. Place one of the chilled dough disks on the floured surface and sprinkle some flour over it. Roll the dough from the center out in every direction, flouring the work surface as necessary to prevent sticking. You want a round about 1/8 inch or slightly less thick and about 12 inches in diameter.
5. Transfer the dough to a 9-inch pie pan by rolling it loosely around the rolling pin and unrolling it carefully over the pan. Press the dough first into the bottom of the pan and then against the sides. Patch any holes or cracks with dough scraps. Trim the edges of the dough with scissors, leaving about 3/4 inch of overhang. Tuck the overhand underneath itself and, using your thumb and index finger, crimp the edge. Refrigerate the pie shell while you roll out the lattice top.
6. Remove the second round of pastry from the refrigerator and, on a lightly floured work surface, roll it into another 12-inch round. Using a pastry wheel or chef’s knife, cut the round into ½-inch wide strips.
7. Remove the pie shell from the refrigerator and pile the peach filling into it. Lay half of the pastry strips on top of the filling in one direction, spacing them 1 inch apart and leaving a small overhang at the edges. Lay the remaining strips on top, crossing the other strips diagonally and creating a lattice pattern (I don’t bother to weave them), leaving an overhang. Tuck the edges of the dough under itself. Refrigerate the pie for 30 minutes, until firm.
8. Preheat the oven to 425°F. Remove the pie from the refrigerator. Brush the lattice pastry with the egg wash, then sprinkle with the demerara sugar. Place the pie on a baking sheet and bake for 15 minutes. Reduce the heat to 375°F and bake until the pastry is golden and the pie is bubbling, 50 to 60 minutes (cover the pie with tented foil during baking if it is browning too quickly). Cool the pie before serving with vanilla ice cream.

the first slice came out a little messy looking but it is delicious and I am outta ice cream 🙁