In a medium bowl, mash bananas. Mix eggs, maple syrup, salt, baking powder, vanilla extract, cinnamon, and Greek yogurt into mixture.
3. Step
Add oats and milk, and mix. Let the mixture sit for a few minutes, so the oats soak up the liquid and the consistency is like oatmeal.
4. Step
Line muffin tins with muffin liners. Pour the mixture into each muffin cup about ¾ full. Add your preferred toppings and gently push your toppings into each muffin cup.
5. Step
Bake for 30 minutes.
6. Step
Let cool for 5 minutes before eating. Once cool, you can also store in an airtight container or freeze in a storage bag.