01 -
Preheat the oven to 190°C.
02 -
Peel and thinly slice the apples, then combine with brown sugar, ground cinnamon, nutmeg, lemon juice, and cornstarch in a mixing bowl.
03 -
In a separate mixing bowl, blend the oats, flour, brown sugar, salt, and cinnamon. Using a pastry cutter or fingertips, work in the cold cubed butter until the mixture forms coarse crumbs.
04 -
Transfer the apple mixture into a baking dish or cast iron skillet and spread evenly. Distribute the crumble topping over the apples.
05 -
Bake for 30 to 35 minutes, or until the topping is golden brown and the filling is bubbling.
06 -
Remove from the oven and allow to rest for 10 minutes before serving warm.