For the Filling:
ADD blueberries, maple syrup, lemon juice, lemon zest and cinnamon to a small saucepan.
BRING mixture to a boil, reduce heat and simmer for 10 minutes.
TAKE off the heat and whisk in chia seeds and dissolved arrowroot powder.
LET cool while you prepare the crust.
For the Topping:
ADD all topping ingredients to a small bowl.
MIX using a fork until combined. Set aside.
For the Crust:
PREHEAT oven to 350°F. Lightly grease a 9.5” or 10” pie dish.
MIX all ingredients in a medium bowl until they form a ball.
PRESS the dough using by hands across the bottom and up the sides of your pie dish.
BAKE crust for 13 minutes.
REMOVE from the oven, pour blueberry filling, top with crumble. Return to the oven and bake for 20 minutes. Let cool for 30 minutes before slicing.