Preheat oven to 350°F (175°C) and grease a standard 9x5 inch loaf pan with non-stick spray.
In a high-speed blender, process the cottage cheese until a completely smooth, liquid consistency is achieved.
In a large mixing bowl, combine the mashed bananas, blended cottage cheese, eggs, maple syrup, and vanilla extract; whisk until the mixture is homogeneous.
In a separate medium bowl, sift together the oat flour, protein powder, baking soda, baking powder, salt, and cinnamon.
Gradually fold the dry ingredients into the wet mixture using a silicone spatula until just combined, ensuring no dry pockets remain.
Pour the batter into the prepared loaf pan and level the surface with a spatula.
Bake for 45 to 55 minutes, or until an internal temperature of approximately 200°F (93°C) is reached or a skewer inserted into the center comes out clean.
Allow the bread to cool in the pan for 10 minutes before transferring to a wire rack for complete cooling to set the structure.