01 - Preheat oven to 350°F. Line a 9 x 5 inch loaf pan with parchment paper.
02 - In a large mixing bowl, mash bananas thoroughly. Whisk in eggs, applesauce, maple syrup, and vanilla extract until smooth.
03 - In a separate bowl, combine oat flour, protein powder, baking soda, baking powder, cinnamon, and salt.
04 - Gently fold dry ingredients into wet mixture until just combined. Do not overmix.
05 - Stir in nuts or chocolate chips if using.
06 - Pour batter into prepared loaf pan and smooth the top evenly.
07 - Bake for 45-55 minutes, or until a toothpick inserted in center comes out clean.
08 - Let cool in pan for 10 minutes, then transfer to wire rack to cool completely before slicing.