Preheat oven to 350 degrees and prepare a cookie sheet with parchment paper
Mix bananas, vanilla, peanut butter, and maple syrup into a creamy consistency in a large bowl.
In another bowl, combine oats, flour, baking powder, and salt.
In a medium saucepan, bring 1½ cups of water to a boil. Add the lentils, reduce the heat, and cook until beans are softened, about 15 minutes. Drain and set aside.