I find them rather like a potato with a very light banana undertone. Have only made them fried, as taught to me by a close Puerto Rican friend who makes them all the time.
I peel them, slice them about 1/2" thick & shallow-fry them on both sides for a couple of minutes & remove to paper towels to drain & cool slightly. They are then gently & lightly crushed - still retaining their shape - with the broad side of a kitchen knife, & refried until golden & crisp to taste, again drained on paper towels, sprinkled with salt, & served.