Pour the oats into a large bowl with 2/3 cups of water. Stir. Cook in microwave for 45 seconds. Stir. Cook in microwave for 35-45 more seconds. Watch carefully to avoid the oats boiling over the side of the bowl.
Mix in the cinnamon (optional). Top with banana slices, brown sugar, and peanut butter. Option to add a splash of a lactose-free milk.
Notes
Feel free to use steel cut oats if you prefer them over quick oats!
You can increase/decrease the amount of oats to 1/2 cup or 1/4 cup depending on your appetite.
It's also yummy if you mash the banana and mix it into the oats before cooking in the microwave.