9 Granny Smith apples
1 lemon, zested and juiced
1 cup granulated sugar, separated
1 ¾ cups all purpose flour, separated
¾ cup brown sugar, packed
2 teaspoons ground cinnamon, separated
½ teaspoon ground nutmeg
½ teaspoon allspice
½ teaspoon ground ginger
1 large pinch kosher salt
1 cup rolled oats
2 sticks unsalted butter, cold and cut into cubes
Preheat the oven to 350 F.
Peel and core the apples, and cut them into roughly 1-inch cubes. Transfer the fruit to a large mixing bowl.
To the bowl, add the lemon zest and juice, ¼ cup granulated sugar, ¼ cup all-purpose flour, 1 teaspoon ground cinnamon, and all the ground nutmeg, allspice and ginger. Stir to ensure every piece is coated.
In a separate, medium mixing bowl, combine the remaining flour, granulated sugar, brown sugar, salt, oats, and butter. Beat vigorously (or use an electric mixer with a paddle attachment) for 1-2 minutes, or until crumbly.
Transfer the fruit mixture into a 9-by-12-by-2-inch baking dish. Evenly distribute the crumble over the fruit so that none of the fruit mixture shows.
Bake for 45-60 minutes, or until the topping is golden brown, and the fruit mixture is bubbling up around the edges. Allow to cool 10-15 minutes before serving.