I cut WITH the curve of the banana, not against it. SInce some of the bananas are in a C-shape, cut along the banana drawing a C shape so that you get a straight instead of curved piece.
You can roll several slices around one another to get a thicker cinnamon roll.
I purchased the Royal Treatment sampler box from 7 Hot Dates.
You can even take whole cinnamon sticks and grind them in a high speed blender to make your own fresh cinnamon powder for this recipe.