Baked Blueberry Lemon Oatmeal Muffin Cups

“*You can sub in applesauce or mashed banana for the Greek yogurt, if you want to keep the oat cups dairy free. **Monk fruit is a plant-derived, calorie free sweetener. This is the one I am using. If you prefer, you can use coconut sugar or really any granulated sugar instead of the monk fruit. ***I like to store these muffins in an airtight container in the fridge where they will happily last up to one week.  ****To reheat the muffins, you can slice them in half and place them in the toaster”