Preheat oven to 350°F (180C). Line a 12 hole muffin pan with parchment paper. Slightly oil with oil spray. Set aside.
In a large mixing bowl, whisk together mashed banana, maple syrup, egg, olive oil, almond milk, and vanilla.
Stir in the dry ingredients: flour, baking powder, cinnamon, salt, shredded carrots, and rolled oats.
Stir until just combined. Don't over mix, or the muffins will be dense and packed.
Fill each muffin cup up to 3/4 level and sprinkle some oats on top of each banana carrot muffin.
Bake for 20-25 minutes or until golden brown on top and a pick inserted in the center comes out clean.
Cool the muffins down immediately on a wire rack.