Add the butter to a skillet and place over medium heat. Once the butter has melted, add the chopped apple and cinnamon. Stir to combine and sauté until they are just cooked but still crisp, 2 to 3 minutes.

Meanwhile, combine the oats and almond milk in a medium saucepan. Bring the mixture to a boil then lower the heat to a simmer. Cook for 3 to 5 minutes or until the oatmeal reaches your desired consistency. Stir in the vanilla.

Split the oatmeal between 2 bowls and top each with half of the apple-cinnamon mixture.