In a bowl combine all the ingredients: rolled oats, milk, plain yogurt, mashed banana, chopped walnuts (if using), honey, chia seeds (if using), cinnamon, vanilla extract and salt. Mix everything together thoroughly.
Pour the oats into two containers like a mason jar and seal with a lid (see notes). Place in the fridge for a minimum of 4 hours, but preferrably overnight to let oats absorb all the liquid.
In the morning, take out from the fridge and give it a good stir. Add any toppings you want like sliced bananas and chopped walnutes. Overnight oats are eaten cold with a spoon.
Recipe Notes:
If you want, you can add sliced bananas halfway through adding the oats to the mason jar. Then add some more on top.STORE IN THE FRIDGE: Once you’ve made your oats, store them in an airtight or sealable container in the refrigerator. This will keep them fresh and ready to eat whenever you need them. These will keep up to 4-5 days in the fridge.SERVING LEFTOVERS: Simply give the creamy oats a stir before serving to redistribute any liquid that may have separated. Add any desired toppings and serve.