Step 1

Preheat oven to 350F. Add the flour, salt, rolled oats, and brown sugar to a large bowl then mix together. You can also add 1/2 tsp of cinnamon if desired.

Step 2

Add the COLD cubed butter to the mixture and work together with your hands until you have a crumbly, not powdery mixture then set aside.

Step 3

Add the brown sugar and corn starch to a large bowl then mix together. Peel apples and cut flesh from core. Cut into thin slices and transfer to the bowl.

Step 4

Squeeze about 2 tablespoons of lemon juice onto the apples and then drizzle with vanilla and sprinkle with cinnamon. Toss to combine.

Step 5

Add the apples to the 8x8 baking dish in a few layers. Placing a few pats of butter throughout then top with the remaining apples.

Step 6

Add the topping onto the apples and bake at 350F for about 45 minutes or until the top is golden brown and the juices are bubbling.