Split the banana lengthwise into 3 pieces. Cut it into small pieces without peeling off the skin.
2)Cook yam and banana along with pepper powder, turmeric powder and salt in a cup of water.
Grind together one fourth quantity of grated coconut and cumin seeds and add to it along with the cooked beans.
Grind the remaining coconut and saute on a low flame, till brown in colour. Keep it aside.
Heat ghee in a smll pan.
Splutter mustard seeds.
Add coconut oil, seasoned mustard seeds and the sauteed coconut into the vegetable mixture.