Heat a small pot over medium-high heat. Add the rolled oats and milk and stir to combine.Once oatmeal reaches a boil, turn heat down to low. Add the sliced bananas and stir to combine. Add the cacao powder and PB2, and more milk as needed to combine**. Cook for 5-7 minutes or until oatmeal is completed cooked.Add the egg whites and continue stirring to avoid scrambling the eggs. The egg whites should only take 1-2 minutes to cook. The oatmeal should appear completely cooked and the egg whites should combine into the oatmeal.Take oatmeal off the heat, add vanilla extract and (optional) dark chocolate. Stir to combine.Pour into bowl, and add toppings of choice.