Squish the bananas using a fork.
Add all remaining ingredients to the bananas and mix them together thoroughly until all ingredients are evenly distributed.
Form little balls out of the mixture. You can use an ice cream scoop or a spoon to do this. You can also use your hands of course but be careful: it's really sticky! If you wet your hands lightly, then it's easier to form the balls.
The oatmeal balls go into the refrigerator so that they can solidify. If you store them here, the little balls will stay good for a long time.