Steam 1 cup beans. Cut 1 tomato, 1 onion. Heat oil in a pan, add mustard seeds, jeera, urad dal and chana dal, 3 red chillies, and curry leaves. When the mustard seeds begin to splitter, add onions and fry till golden brown. Add you tomatoes and cook well. When done add your steamed beans and salt, and cook for about 5 mins and serve with sambhar or any kolumbhu