Nendhrampazham or plantains as they are called here, is a kerala speciality. This fruit is used to make chips, bajjis and also eaten steamed. I am sure that there are many many dishes made out of this fruit, these are the few I can recall just now. The nendrampazham is very tasty to eat as is too. Steamed nendhrampazham is something I've enjoyed from when I was very young.
I have bought this fruit at times from indian grocery stores, and was delighted to find it in the local grocery. Though it is from Mexico, it tastes quite similar to the kerala fruits.
Plantains - 2-3
Jaggery - 3-4 tbsps
Cut each plantain into 3-4 pieces
Place in a wide heavy bottomed skillet
Sprinkle jaggery over the plantains
Add just enough water to cover the fruits
Cover and steam for about 15-20 minutes or till done.
Serve hot with papadums
Add a dash of cardamom to the fruits while steaming for additional flavor. The jaggery can be varied to suit individual tastes.