Keep cooker on stove ad dal, turmeric, Hing, chopped tomato and let them cook for 3-4 whistles.
Keep a pan on stove add oil let oil heat then add Mustard seeds, black gram splits, fenugreek seeds, Red chili, Cumin seeds, curry leaves, garlic cloves, chopped onions, chopped green chili, turmeric and let them fry till onions changed to light brown color.
Add tomato pieces and let them cooked then add Chili powder, curry leaves,1/2 glass of water and cooked dal.
Then add tamarind juice to it and let them boil then sprinkle coriander leaves.
Cook covered till you get the desired gravy consistency.