First, peel one banana, add to a mixing bowl, and mash with a fork.
Once mashed, add the remaining ingredients to the mixing bowl including rolled oats, drinkable yogurt, maple syrup, chia seeds, cinnamon, and a dash of salt.
Mix all the ingredients together, then pour into two small containers. Cover the containers and chill for 3+ hours, or ideally overnight, in the fridge.
The next day, take the overnight oats from the fridge, add your desired toppings, and enjoy cold or warmed up!