Start by washing, coring, and finely dicing one sweet apple. You can peel it if you prefer, but leaving the skin on adds extra fiber and nutrients.

In a small saucepan, combine the diced apple, rolled oats, water or milk, cinnamon, and a pinch of salt.

Bring the mixture to a low simmer over medium heat. Once it's simmering, reduce the heat to low, cover, and cook for 10-12 minutes. Stir occasionally to prevent sticking. The oatmeal is ready when the oats are tender and have absorbed most of the liquid.

Remove the saucepan from the heat and let the oatmeal sit, covered, for another 2-3 minutes. This final step allows it to thicken into a perfectly creamy consistency. Serve warm with your favorite toppings.