Preheat the oven to 350-degrees.

Butter the bottom and sides of a medium baking dish and set aside.

Peel and core the apples.

Cut them into bite-sized chunks and place in a mixing bowl.

Add the white and brown sugars, cornstarch, salt, cinnamon, nutmeg, and vanilla extract.

Let the fruit mixture macerate for 10 minutes.

Meanwhile, in a small bowl, mix together the topping ingredients using a Dough Blender  or the back of a fork to cut the butter into the dry ingredients until it is crumbly, but combined. Transfer the apple mixture into the prepared baking dish.

Sprinkle the topping over the fruit.

Bake for about 30 minutes until the apple mixture begins to bubble up through the topping.  You want the crust to be a beautiful golden brown.

Remove from the oven and let cool and set for 10 minutes.

Now scoop up some vanilla ice cream and enjoy!