Tartine’s Apple Crisp

Ingredients

• 3 pound apples assorted
• 1.3 cup flour all-purpose
• 1 tablespoon ground cinnamon 
• 0.3 teaspoon kosher salt divided
• 3 tablespoon juice of lemon 
• 1  lemon zest 
• 1 teaspoon trubinado sugar 
• 1.3 cup sugar divided
• 1 cup butter unsalted cold for the baking dish plus a bit more

Equipment

• oven
• whisk
• mixing bowl
• wire rack
• blender
• baking pan
• wooden spoon
• aluminum foil

Directions

1. Preheat the oven to 350F. Butter the bottom and sides of a 9?13-inch baking dish.Peel (some or all, as you prefer), core and slice the apples and place them in a large mixing bowl. In a small bowl, stir together ¼ cup sugar, lemon juice and zest, and 1/8 teaspoon salt.
2. Add to the apples and mix well with your hands.
3. Transfer the apples to the baking dish.Make the topping.
4. Place the butter and remaining 1 cup sugar in a mixing bowl. Using a mixer fitted with the whisk attachment on medium speed, or using a wooden spoon, beat together until smooth.
5. Add the flour, cinnamon and remaining 1/8 teaspoon salt and mix just until it comes together into a smooth dough.Scoop up palm sized balls of the dough and flatten with your hands as if you are making a ¼-inch thick tortilla, and lay on top of the apples. Cover the entire surface with the dough. If there are gaps, that is okay, as they will allow steam to escape during baking.
6. Sprinkle top with turbinado sugar, if using.
7. Bake until the crisp is browned and the apples are tender, about 1 hour. If the top gets too dark, cover it with aluminum foil.
8. Let cool on a wire rack.