Combine dal and water in a pressure cooker. Cook until dal is very soft and mushy. I cook in the Instant pot for 8 minutes on high pressure. Keep aside.
In a medium size pan on medium flame, heat oil. Add mustard & cumin seeds, dry red chilies and cook till the seeds start to splutter. Add hing, curry leaves and green chilies. Cook for 1 minute.Add the chopped chukka kura leaves and cook till wilted, about 3~4 minutes.
Next add tomatoes and turmeric and salt. Cook till they turn mushy, about 3 minutes. Add cooked dal and mix well. Stir in some water if dal looks too thick. Simmer for 3-4 minutes for the flavors to mingle. Serve hot with rice or roti.
Video
Notes
Sub moong dal with either toor dal or masoor dal in the recipe.
If you are using toor dal, then you can also use onion. Simply sauté them before adding the greens.
Chukka kura is a slightly sour tasting green. If you want to enjoy the taste of the greens even more, omit the tomato.
Also you can make the dal taste even more sour by adding about 1 teaspoon of tamarind paste.