Pluck and clean the drum stick leaves, remove as much stem possible, wash them in running water and set aside.
In pressure cooker cook the toor dal with 1 ½ cup water for 3 whistles (it takes about 15-20 minutes) and set aside.
In a medium sauce pan heat 1 ½ tablespoon of oil and add cumin seeds once they starts splutters add chopped onion and curry leaves fry them until they become translucent or change color it takes about 6 minutes.
To add ginger garlic paste and fry for another 2 minutes. Add salt, turmeric, cumin, coriander, gram masla and chili powder and fry for 1 minute.
To the above mixture add tomato cook for another 2 minutes or until tomato become soft. To onion tomato masala mix add cleaned drum stick leaves and cook until they are wilted it takes about 7 minutes.
Once they are well done add cooked toor dal and let it boil for another 2 minutes with stirring in between. Adjust the spice and salt if needed. Add water if needed to make desired consistency.
In a small pan heat rest of the oil and mustard seeds halved chilies and coriander leaves. When mustard seeds starts popping switch of heat and add to cooked dal muringa mixture.
Enjoy warm with rice or roti.