In a large bowl, gently toss together the pear slices, brown sugar, flour, lemon juice, cinnamon, ginger, and salt. Set aside for 5-10 minutes while you prep the crust.
2 and 1/4 cups pear slices, 2 Tablespoons brown sugar, 2 Tablespoons all-purpose flour, 1 and 1/2 teaspoons fresh lemon juice, 3/4 teaspoon ground cinnamon, 1/4 teaspoon ground ginger, 1/4 teaspoon kosher or flaked sea salt
Preheat oven to 425 degrees F and line a large rimmed baking sheet with parchment paper or a silicone mat. Roll pie crust into a large circle and place on the parchment. Don’t worry if the circle is not precisely even.
1 pie crust
Transfer the pears and the sugar mixture from the bowl onto the top of the pie crust, leaving a 2-3 inch border around the edge. You can just scatter the pears in the middle or arrange them in a specific pattern if you like.
Fold the edge up and over the fruit, overlapping it every few inches into a sort of a pleat. Gently press the seams to seal. Drizzle caramel sauce evenly over the filling, but not over the crust.
2-3 Tablespoons salted caramel sauce
To make a quick egg wash, whisk egg and milk or water together in a small bowl. Brush this mixture over the exposed rim of the galette, then sprinkle the rim lightly with turbinado sugar.
egg wash: 1 large egg and 1 Tablespoon milk or water, 1 Tablespoon turbinado sugar
Bake for 25-30 minutes, until the crust is golden brown and the pears are very tender. Let cool on the baking sheet for 5-10 minutes before slicing and serving. Serve with scoops of ice cream, an extra drizzle of caramel sauce, and a sprinkle of sea salt, if desired.