Add the oats, milk, maple syrup, cinnamon, vanilla and salt to a medium pot on the stove.
Bring to a low boil over medium/high heat, then reduce heat to low and let simmer until thick, stirring occasionally. This will take about 5-10 minutes. If you prefer it a bit less thick, just add more liquid.
Meanwhile, melt the butter in a saute pan over medium heat. Add in the diced apples, maple syrup and cinnamon. You can also add in some brown sugar here, but I wanted to keep this as low sugar as possible. Saute, stirring regularly, for about 5-10 minutes or until the apples are soft and nice and brown. Feel free to add any nutmeg, ginger, etc.
Divide the oatmeal among two bowls, then top with the sauteed apples, chopped nuts if desired (I like almonds, walnuts or pecans here) and an extra drizzle of maple syrup. Nut butter and a dollop of greek yogurt is also delicious for more flavor and added protein. Enjoy!