An easy, gluten-free, and vegan treat, perfect all Summer long! A shortbread cookie base + Blueberry Lemon filling + Crumble, each layer is delicious by itself, together it is magical!
Using a hand mixer, add flour, cane sugar, and salt to a large mixing bowl and on low speed combine for about 5 seconds. Using your hands, press the dough into an even layer in the prepared baking pan.
Add the reserved dough, brown sugar, pecans, and oats to the mixing bowl used for the base. Using a mixer, pastry cutter, or your hands, mix until combined and "crumbly". Set aside.