Step 1: Gently combine the blueberry filling ingredients into a large mixing bowl.
Step 2: Transfer the blueberry mixture to the prepared baking dish. Bake for 15 minutes. Remove from oven, carefully stir, and bake for 15 minutes more.
Step 3: Prepare the biscuits. Combine the biscuit ingredients and whisk until ingredients are evenly incorporated.
Step 4: Add almond milk and olive oil to the dry ingredients. Stir until the mixture starts to thicken. Place bowl in the refrigerator to chill.
Step 5: Use a ¼ measuring cup to drop the biscuit dough on top of the blueberries. Brush the tops of the biscuits with almond milk.
Step 6: Bake for 24-26 minutes, or until the tops of the biscuits start to turn a light golden brown.