Yield 8 servings
This Lattice-Top Wild Blueberry Pie highlights wild blueberries in all their deep purple, naturally sweet goodness. A glorious late-summer dessert.
For the crust: In a food processor, pulse the flour, salt, and sugar together. Add the butter, and pulse until the mixture resembles coarse meal, with a few pea-sized pieces remaining. Add 1/4 cup (60 ml) ice water and pulse until the dough is crumbly but holds together when squeezed. (If needed, add more water, 1 tbsp (15 ml) at a time, pulsing between each addition, until you reach the right texture). Do not overmix.
Turn the dough out onto a work surface. Knead once or twice, just until the dough comes together. Gather into a ball. Divide in half and flatten each portion into disks. Wrap each disk in plastic wrap and refrigerate at least one hour or up to three days. (You can also freeze the dough for up to three months.)
Take the dough out of the refrigerator 15 minutes before rolling. On a lightly floured work surface, roll out one disk of dough to a 12-inch (30-cm) round. Fit dough into a lightly greased 9-inch (23-cm) pie plate, pressing it down gently so it eases into the bottom of the plate. Trim the excess dough, leaving a 1-inch (2.5-cm) overhang all around. Refrigerate.
On a lightly floured work surface, roll out the second disk of dough to a rough rectangular shape about 1/8-inch (0.3-cm) thick. Using a sharp knife (and a ruler to help, if desired), cut about 20 strips of dough that are 1/2-inch (1.25-cm) wide. Line a cookie sheet with parchment paper. Arrange 10 of the dough strips horizontally 1/2-inch (1.25-cm) apart. These will be the “bottom” strips.
Fold back every other bottom strip to the left slightly more than halfway. Slightly left of center, lay down one “top” strip vertically over the bottom strips. Unfold the bottom strips. Fold back the other 5 bottom strips to the left, and lay a second strip 1/2-inch (1.25-cm) to the right of the first. These are the two center strips. Unfold the bottom strips. Repeat the process on both sides with the remaining strips of dough. (See note for instructions to make a more elaborate lattice pattern.)
Loosely cover the lattice with plastic wrap and place the cookie sheet in the freezer while you prepare the filling.
For the wild blueberry filling: Preheat oven to 400°F (200°C).
Place the wild blueberries in a large bowl. Scoop up about 1 cup (250 ml) of blueberries and put them in another medium-sized bowl. Add the sugar, cornstarch, flour, lemon zest and juice, and the salt. Mash with a potato masher or a fork until the cornstarch and flour have dissolved and the mixture is almost homogeneous (there will be bits of blueberries throughout).
Pour the mixture in the large bowl containing the remaining blueberries and carefully fold it in until the blueberries are all coated with the “glue”. Transfer the mixture into the chilled pie shell, gently pressing down on the berries if needed so that they all fit into the pie (they will cook down a little).
To assemble: Remove the lattice from the freezer, and carefully invert it over the blueberry filling. The lattice should be pretty stiff by now, so let it rest about 5 minutes so it softens a little. Trim excess lattice dough, leaving a 1/2-inch overhand all around. Tuck edge of lattice between the edge of the bottom dough and the rim of the pan. Using your fingers, press both layers of dough along the edge to seal, and crimp as desired. Place pie on a parchment-lined baking sheet.
In a small bowl, whisk together the egg yolk and water. Brush lattice with the egg mixture, and sprinkle with coarse sugar or maple sugar all over. Bake until crust begins to turn golden, about 20 minutes. Reduce oven temperature to 350°F (175°C). Continue baking, rotating sheet halfway through, until the crust is deep golden brown and juices are bubbling and thick, 40 to 50 minutes more.
Transfer the lattice-top blueberry pie to a wire rack to cool for at least 2 hours before serving it. The pie is best eaten the day it is baked, but you can make it up to 1 day ahead and store it, covered loosely with plastic wrap when cool, at room temperature. Leftovers keep in the refrigerator for up to 5 days.
Recipe Credit: Marie Asselin, FoodNouveau.com
Crust recipe adapted from Martha Stewart.
Courses Dessert, Snack
Recipe by Food Nouveau at https://foodnouveau.com/recipes/desserts/cakes-pies/lattice-top-wild-blueberry-pie/