Add water, oats, and cinnamon stick to a pot over medium heat. Once it begins to boil, give it a stir and then cover. Reduce heat to Low. Cook for 15-20 minutes.
When finished cooking, remove from heat and stir in a little butter and milk. (If you want to sweeten it up you can add a touch of maple syrup or honey.)
Dish into small serving bowls and spoon in a little yogurt and fresh fruit. Sprinkle with cinnamon and serve.
Recipe by Cake Student at https://www.cakestudent.com/yogurt-oats-and-mango-breakfast-treat/