We've made it before! It is soooo good...
It DOES take a LOT of time, and probably the first couple won't turn out the best.
You need to cut the bread thick, and make a pocket. The bananas stay in fine if you don't over stuff them.
Also, If you are looking to cut a few calories (HA!) This dish works well using a Splenda/cinnamon mix and the best sugarfree syrup is Mrs Buttersworth.
(Can you tell I have a diabetic in the family?)
Allow yourself PLENTY of clean oil, and lots of time! This is NOT a dish to make before Sunday Services!
Good Luck!