In a medium bowl, mash the banana until mostly smooth. Add the egg and stir to combine.
3. Step
Add the honey, baking powder, cinnamon, nutmeg, salt, vanilla and Greek yogurt and mix well. Fold in the oats, then stir in the milk.
4. Step
Fill each cup of a greased 6-cup muffin tin ¼ of the way full. Add your additions of choice, then fill the muffin cups to the top with the rest of batter and top with more fruit or nuts.
5. Step
Bake the muffins for 30 minutes, or until risen slightly and golden brown around the edges.
