Good that banana's a favorite because the flavor is strong enough to hide just about anything! Tyler used to be a fan of banana and greens like spinach, kale, and broccoli. Yes, I know, EWWWWW. But for the longest time, that was the only way he'd eat anything green.
Seriously, try not to think about how it tastes. Babies like the weirdest stuff, and it only gets worse when they're toddlers (Tyler asked for ketchup in his cottage cheese today. Blech!). Throw some banana into anything and see how it goes over!