I would most definitely vote for Bauer's Banana Cereal bars.
They are brilliant. I mess around with the recipe and they always work (dates and figs are particularly good).
My 3-yr-old can make them.
Everyone always asks for the recipe whenever I make them.
I always have left over manky brown bananas.
I must make them about once a week.
AND they're just about healthy enough to go in a lunch box.
Yum.