Mash 1/2-1 banana with a fork in a mason jar. Add in oats, almond milk, yogurt, chia seeds, cinnamon and vanilla into a mason jar with a lid.
Stir ingredients together. Place in the fridge overnight.
The next morning, remove lid and give oats a big stir. If they seem pasty you can add a little more almond milk to thin them out.
Last, add your favorite toppings (exaamples include: berries, hemp seed, unsweetened shredded coconut etc.) and enjoy straight out of the mason jar or in another bowl.