Combine the oats, almond milk, protein powder, chia seeds, vanilla extract, and cinnamon in a small container, leaving out the toppings for now.
Seal the container with a lid and refrigerate overnight, or for at least 1-2 hours, to allow the oats to soak and soften.
In the morning, give the mixture a good stir. If it's too thick, feel free to mix in a little extra almond milk or water to reach your desired consistency.
Finish by adding your favorite toppings such as berries, sliced almonds, or a dollop of almond butter, then dig in!