01 - Preheat oven to 350°F. Line a 9 x 5 inch loaf pan with parchment paper.
02 - Mash bananas thoroughly in a large mixing bowl. Whisk in eggs, applesauce, maple syrup, and vanilla extract until smooth and fully incorporated.
03 - In a separate medium bowl, combine oat flour, protein powder, baking soda, baking powder, cinnamon, and salt. Whisk to distribute evenly.
04 - Gently fold dry ingredients into wet mixture until just combined. Avoid overmixing to prevent dense texture. Stir in nuts or chocolate chips if desired.
05 - Pour batter into prepared loaf pan and smooth top. Bake for 45 to 55 minutes until a toothpick inserted in center comes out clean.
06 - Let bread cool in pan for 10 minutes, then transfer to wire rack. Cool completely before slicing to ensure clean cuts.