Prep up the Green Banana: Rinse and cut the stem of the raw banana and boil in a pot of water till fork tender. Cool down and peel the skin. Chop to bite sized pieces or crumble them.
Temper the spices: Heat oil in a pan and add mustard seeds, cumin seeds, chana dal and urad dal. Let fry until golden and aromatic. Add the curry leaves and ginger. Saute for a minute.
Stir in the hing, onions and green chilies. Saute until transparent. Add salt, turmeric and the cooked banana. Mix well and saute for 2 to 3 mins.
Cover and cook on a low flame for 4 to 5 minutes. If the banana is still under cooked, add a splash of water and cook until fully tender. Taste test and adjust salt to taste. If you want it hot, add some black pepper. Turn off and squeeze some lemon juice.
Garnish aratikaya kura with corinader leaves. Serve with hot rice, ghee and rasam or sambar.