Collect all your ingredients and add them to a blender or food processor.
Blend well. You will need to stop the processor or blender a few times and adjust things with a spatula just to be sure you got all the bananas blended. There are always a few rascals in there that like to hide.
Pour this into a loaf pan.
Place in the freezer for up to 2 hours, or until it reaches a scoopable consistency. Note that this will be more on the level of soft-serve ice cream. If you freeze this for too long, you'll have a hard block that will need to thaw again. DO NOT OVER-FREEZE!
Scoop and serve.
Notes
Please note that the nutrition data given here is a ballpark figure. Exact data is not possible.