Follow these simple steps to create your Blackberry Pie Overnight Oats:

1. Combine Dry Ingredients: In a mixing bowl, add the rolled oats, chia seeds, cinnamon, and salt. Mix well.
2. Add Milk and Sweetener: Pour in the almond milk and maple syrup. Stir until everything is well combined.
3. Incorporate Vanilla: Add the vanilla extract and mix until evenly distributed.
4. Add Blackberries: Gently fold in the blackberries, being careful not to mash them too much.
5. Add Greek Yogurt (Optional): If you prefer a creamier texture, mix in the Greek yogurt at this stage.
6. Transfer to Jars: Divide the mixture into individual jars or containers with lids.
7. Chill: Seal the jars and place them in the refrigerator. Allow them to chill for at least 4 hours or overnight.
8. Serve: In the morning, give the oats a good stir, and add more blackberries or toppings if desired.

These steps will guide you in making a delicious breakfast that combines the best of both worlds: nutritious oats and the delightful flavor of blackberry pie!