Add all ingredients to a large bowl and mix well until everything is combined then scoop the oatmeal mixture into your muffin tin using a large ice cream scoop. (Spray non-stick spray onto the muffin tin first if you have a non-stick muffin tin)
Bake the oatmeal cups for 20 minutes, or until cooked through. Let it cool before removing it from the muffin tin or it might not keep its shape.
Optional: top them off with the toppings of your choice such as yogurt, almond butter, more apple pieces and sunflower seeds.
Notes
Freeze them & thaw them out as needed. You can also re-bake them at 350 for 10 minutes.