APPLE GALETTE

Steps:

• Preheat oven to 375°F. Remove chilled dough from refrigerator, unwrap, and place on a lightly floured work surface. Let stand about 10 minutes (to soften slightly). Bang on dough with a rolling pin (to begin flattening and soften a bit more).
• Dust top and pin with flour, position pin on center of disk, and begin rolling dough away from you. Give disk a quarter-turn and roll again. Continue turning and rolling in this manner until you have a 13-inch round with an even 1/8-inch thickness. Transfer to a parchment-lined rimmed baking sheet. Refrigerate while making filling.
• In a large bowl, combine apples, granulated sugar, flour, lemon juice, salt, and cinnamon. Spread filling evenly over dough, leaving a 1 1/2-inch border. Fold edges of dough up and over apples, leaving most of fruit exposed and overlapping dough as needed. Brush dough with beaten egg; sprinkle with sanding sugar. Refrigerate 15 minutes.
• Bake until crust is golden, apples are tender, and juices are bubbling in center, 1 hour to 1 hour and 5 minutes. Using a pastry brush, spread some of juices from center of galette over apples. Transfer sheet to a wire rack; let cool 10 minutes. Using a large spatula, loosen galette from parchment and move away from any released juices (so it doesn't stick to parchment as it cools). Slide galette (still on parchment) onto rack and let cool. Serve warm or room temperature.