In a large food processor, pulse together the 1 1/4 cups flour, 1 tablespoon sugar and 1/2 teaspoon coarse kosher salt. Add the cold and cubed 1/2 cup salted butter and pulse again until pea-size pieces form. Pour in the 1/4 cup ice cold water and pulse until a dough has formed.
Transfer the dough to a sheet of plastic wrap and form into a disk, covering completely. Chill the dough in the refrigerator for 1 hour to overnight.
Strawberry Filling & Prep:
Preheat the oven to 400°F and line a baking sheet with parchment paper.
In a large mixing bowl, toss together the sliced and blotted 3 cups fresh strawberries, 2 tablespoons corn starch, 3 tablespoons sugar, 2 teaspoons fresh lemon juice and 1 teaspoon lemon zest. Let sit for 10 minutes.
Remove the pie crust from the refrigerator and roll out on a lightly floured surface into a 14-inch circle. The shape doesn't have to be perfect, in fact rustic is better. Transfer the crust to the prepared baking sheet.
Using a slotted spoon, transfer the filling into the center of the dough, leaving a 2-inch border. Discard any leftover liquid.
Crust Topping:
Fold the edges of the dough over the strawberry filling, leaving the center exposed. Brush the crust with the 1 egg white lightly beaten and sprinkle with turbinado sugar.
Bake the galette for 30-35 minutes or until the edges are a light golden brown. Let cool completely so the strawberry filling has time to set and form.
Serve with vanilla ice cream, whipped cream or a dusting of powdered sugar, if desired.
If you've tried this recipe, come back and let us know how it was in the comments or star ratings.
Notes
Storage: Cover and keep at room temp one day or refrigerator three days; you can warm it up at 350°F for 8–10 min.Freezing: I do not recommend freezing this galette, as the strawberries will become quite soggy upon thawing.