A ‘galette’ (French) or ‘crostata’ (Italian) was an early way to form a pie crust in the absence of pie pans. The dough was rolled flat, the filling placed in the middle with the edges turned up to contain the filling.
The origin of the pie (pye) has been traced to Egypt where savory fillings were baked, using woven reeds as the baking vessel. The concept was brought to Greece and then to Rome. It is believed the ancient Greeks created pie pastry and the trade of ‘pastry chef’ was then distinguished from that of a baker. The use of lard and butter in northern Europe led to a dough that could be rolled out and molded into what has become our modern pie crust. Before the emergence of tin or ceramic pie pans, the ancient practice of using the bottom of the oven or fireplace was used to bake this rustic tart.
Galettes can be made in any size, as well as sweet or savory, using only a simple baking sheet. No technique to create an even, fluted crust is necessary. Rusticity is its charm! No worries about tearing the dough or if the final result is perfectly round or rectangular.
The crust of this galette is made with the addition of a small amount of cornmeal to give it a bit of crunch and is equally as good with a sweet or savory filling.
In a small bowl, combine sour cream & ice water; set aside. In a large bowl, whisk together flour, cornmeal, sugar & salt. Using a pastry blender or finger tips, cut in butter until mixture resembles BOTH coarse crumbs & small peas. Sprinkle the cold sour cream mixture over the dough, 1 Tbsp at a time, tossing with a fork to evenly distribute it. After you have added all the sour cream, dough should be moist enough to stick together when pressed; if not, add additional cold water, 1 tsp at a time. Do not overwork dough.
Press dough into a disk shape & wrap in plastic wrap. Refrigerate for at least 2 hours. The dough can be kept in the refrigerator for a day or two or it can be wrapped airtight & frozen for a month. Thaw, still wrapped in refrigerator.
In a bowl, toss together the fruit, all but 1 Tbsp of the sugar, salt, lemon juice & zest & cornstarch.
Preheat oven to 375 F. Line a baking sheet with parchment paper. On a lightly floured work surface, roll out the chilled dough into a circle & set on baking sheet. Place the fruit filling in the middle, leaving a border of 1 1/2 to 2-inches. Gently fold pastry over the fruit, pleating to hold it in. Brush pastry with egg wash. Sprinkle the reserved 1 Tbsp sugar over the crust.
Bake 35-45 minutes until the filling bubbles up & crust is golden. Cool for at least 20 minutes on a wire rack before serving. Best served warm or at room temperature.