Preheat oven to 350, Line a 9x13 pan with aluminum foil and baking spray

In a mixer, beat 1 stick of butter, then add in 1 ½ cups of flour, ½ cup sugar until it is fully mixed and looks like wet sand. Press the dough into the aluminum foil lined pan and pack down. Then using a fork poke holes in the dough. Bake 20-25 mins.

Peel, Core and dice apples. Toss with the remaining 2 TBSP sugar, cornstarch, 1 tsp cinnamon, ½ tsp nutmeg, ¼ tsp allspice and ¼ sp ginger.

Arrange apples in a layer over the cooked shortbread.

In a small bowl combine the remaining ¼ cup flour, remaining ½ stick butter, oats, brown sugar, 1 tsp cinnamon, ½ tsp nutmeg, ¼ tsp allspice and ¼ sp ginger. Mix together until crumbs form. Sprinkle crumb mixture over the apple layer.

Bake the entire thing for 30 mins until the topping is golden brown.

Let it cool and enjoy