A rosy applesauce filling is topped with artfully arranged, paper-thin apple slices in this autumnal tart. A glaze made with apple brandy and quince paste gives the dessert a spectacular finish.
Pate Sucree Extra: Pulse flour, sugar, and salt in a food processor to combine. Add butter and pulse just until mixture resembles coarse meal, about 10 seconds. In a liquid-measuring cup, whisk together ice water and egg yolks. With machine running, add egg-yolk mixture in a slow, steady stream just until dough holds together without being wet or sticky, about 30 seconds. To test, squeeze a small amount together; if it is crumbly, add more ice water, 1 tablespoon at a time. Turn dough out onto a piece of plastic wrap and shape into a rectangle. Wrap tightly and refrigerate until chilled, about 1 hour.
On a lightly floured piece of parchment, roll out dough to a 17-by-14-inch rectangle. Using a paring knife, lightly trace a 1-inch border around perimeter of dough (this border will be folded up over the filling to form the tart crust, leaving a 15-by-12-inch rectangle for the filling). Transfer to a rimmed baking sheet and refrigerate at least 1 hour.
Filling: Combine McIntosh apples, 2 pounds red apples, lemon juice, and 1 1/2 cups water in a large pot. Cover and bring to a boil over high heat, stirring occasionally. Reduce heat to medium, partially cover, and cook, stirring occasionally, until apples are completely soft, about 40 minutes. To remove skins, use chopsticks, or pass apples through a medium-mesh sieve or a food mill fitted with the fine disk. Applesauce can be stored in refrigerator up to 1 week, or in freezer up to 3 months.
Preheat oven to 375 degrees. Spread 2 cups applesauce evenly over chilled dough, staying within 1-inch borders (reserve remaining applesauce for another use).
Halve, core, and thinly slice crosswise remaining 3 to 4 red apples with a mandolin or a very sharp knife, reserving scraps. Shingle 6 slices into a 3-inch square on top of filling in one corner of tart. Brush with lemon juice to keep from browning. Repeat process with remaining apple slices, placing as closely as possible to the previous 3-inch square of apples and alternating the direction of the shingling in a grid pattern (you should have 4 rows of 5).
Fold over 1-inch border of dough to create crust. Brush with egg wash and sprinkle generously with sanding sugar. Bake, rotating halfway through, until crust is deep golden brown all over, 45 to 55 minutes. Transfer sheet to a wire rack and let cool completely.
Glaze: In a medium saucepan, cook reserved apple scraps, 1/2 cup water, sugar, apple brandy, quince paste, and salt over low heat until very soft. Whisk in butter, then strain mixture through a mesh sieve. Brush apples on tart with glaze to coat; let dry. Tart is best served at room temperature.
Pate sucree extra can be frozen for up to 1 month. Thaw overnight in refrigerator or at room temperature for 1 hour before using.