Rinse the oats in a fine mesh strainer. Tap the strainer against the sink to remove excess water. Place the oats into your Instant Pot, along with the (fresh) water, cinnamon stick, and vanilla. Stir once.
Lock the lid into place and make sure the nozzle is pointed in the “sealing” position. Use the “manual” setting and set the timer for 10 minutes. Use the “natural release” method when the timer is up.
When all the pressure is out, remove the lid and stir. The oats will look super watery at first - this is okay - they will thicken as they cool. Allow them to cool completely before you store them in your fridge. Feel free to keep the cinnamon stick in your oats. It will continue to flavor them (just don’t eat it).
Serve with berries, banana, toasted coconut, chopped walnuts and non-dairy milk when ready to eat.