Preheat oven to 350° F.
Prepare twelve muffin cups by coating with spray. Set aside.
Combine eggs, vanilla extract, bananas, and honey in a large bowl; mix well. Set aside.
Combine oats, cinnamon, and baking powder in a medium bowl; mix well.
Add oat mixture to egg mixture; mix well.
Add almond milk; mix well.
Divide oat mixture evenly between prepared muffin cups.
Top evenly with walnuts and raisins.
Bake 26 to 30 minutes, or until golden brown and toothpick inserted into the center comes out clean.
Tip: Pecans, cashews, sunflower seeds, dried cranberries, or dark chocolate chips can be substituted for walnuts and raisins.