01 -
Preheat oven to 350°F (175°C). Grease a deep-dish pie plate or large baking dish with butter or cooking spray and set aside.
02 -
In a large bowl, combine the sliced apples, sugar, cinnamon, and vanilla extract. Mix until all apples are evenly coated. Pour the mixture into the prepared baking dish.
03 -
In a medium-sized bowl, combine the flour, oats, brown sugar, salt, and cinnamon. Pour in the melted butter and stir until the mixture is well coated and crumbly.
04 -
Sprinkle the crumb topping evenly over the coated apples in the baking dish.
05 -
Bake in the preheated oven for 45-60 minutes, until the fruit is soft and the topping is golden brown. Allow to cool slightly before serving.