...everybody's free to invent their own variations! :-)
Only I don't think mashing 'em would work; not just like that, mash 'em and you're done. Mashed bananas are far too gooey to hold together in "patties" all by themselves, AFAICS. I suspect you'd have to add flour or eggs or both, make it into a kind of batter.
And that would be a whole new, different, dish. But who knows, maybe it's an even better one!