Preheat the oven to 350 degrees.
Mash up your banana with a fork.
Mix all the ingredients together into a bowl, including the mashed banana.
Put some cooking spray on a foil-lined baking sheet.
Scoop one spoonful at a time of the mixture onto the baking sheet, then smash down into circles.
Bake for 15 minutes, until you reach desired "done-ness."
Take them out, and let them cool.
Enjoy.