Banana bread is the classic. Fried plantains are also excellent. Unfortunately, most methods of destroying the pollen enzymes also make the banana mush, so there's not much you can use it in. Throwing the cooked banana into smoothies/milkshakes is good.

Allergies can develop/worsen over time, so maybe it's worse now after not having eaten them. As a kid, I always hated eating apples and bananas. I figured it was because they were healthy and you're not really supposed to like eating them lol