Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Heat half the oil and fry the chana dal, urad dal, and dried red chilies until golden.
Add the tomatoes and salt and cook until soft and pulpy, then cool slightly.
Grind the mixture with a splash of water into a smooth chutney.
Heat the remaining oil, pop the mustard seeds, and add the curry leaves.
Pour the tempering over the chutney and serve with idli, dosa, or upma.