Preheat oven to 425 F and spray a 19x12 baking sheet with cooking spray.
To a large bowl, mix together the oat flour, powdered peanut butter, baking powder, cinnamon, flax and salt.
To a food processor, puree the cottage cheese until very smooth. Add that to the dry ingredients, along with the egg whites, banana and vanilla.
Spread into the prepared baking sheet and top with chocolate chips and banana slices. Bake at 425 for 12 minutes, turning the pan around half way through the cooking period to ensure it cooks evenly. Serve with peanut butter, banana, and maple syrup, if desired.