Soak dalia in two cups of water for thirty minutes Heat oil in a pressure cooker and add cumin seeds.
As they begin to change colour add onion. Sauté till pinkish and add green peas, carrots and tomato. Stir for a minute.
Add dalia and three cups of water. Add salt to taste. Bring to a boil, close lid and pressure cook till two whistles.
Just before serving add butter and coriander leaves.