1 1/4sticks (10 tablespoons)unsalted butterat room temperature
1/2cupgranulated sugar
3large egg yolks
1teaspoon pure vanilla extract
Blueberry Filling
2pints fresh blueberriesrinsed, dried and picked through
1/4cupgranulated sugaror less, if preferred
1tablespoon all-purpose flour
zest of a lemon
juice of 1/2 lemon
Instructions
Cornmeal Dough
In a medium bowl, whisk together the flour, cornmeal and salt. In the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugar until light and fluffy. Beat in the egg yolks one at a time, then add the vanilla. Add the dry ingredients and mix just until the dough comes together. Divide the dough in half, shape into 2 disks, wrap tightly, and refrigerate for at least 20 minutes. (The dough can be frozen for up to 3 months. Thaw overnight in the refrigerator or let it stand at room temperature until pliable.)
Blueberry Filling
Meanwhile, combine the blueberries, sugar, flour, lemon zest and lemon juice in a large bowl. Toss gently to coat. Line a large baking sheet with parchment paper or a silicone baking mat and preheat the oven to 375°F.
Working with one disk of dough at a time, roll the dough into a 9- to 10-inch circle between 2 sheets of parchment paper or plastic wrap. If the dough becomes too soft, refrigerate it for a few minutes before continuing. Transfer the dough circles to the prepared baking sheet. Spoon half of the blueberry filling into the center of each, leaving a 1-inch border. Fold the edges of the dough over the filling, gently pleating and pressing to seal any cracks.
Refrigerate the crostatas for 20 minutes. Bake for about 25 minutes, or until the crust is golden brown and the filling is bubbling. Let cool for 10 minutes before serving. Enjoy warm or at room temperature with vanilla ice cream or freshly whipped cream.
A rustic crostata doesn't have to be perfect. Gently pleat the dough around the filling, and don't worry if the edges are uneven—that's part of its charm.