Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Simmer the tomatoes with water for 10 minutes until completely softened.
Mash or blend the tomatoes into a smooth, thin broth and season with sugar and salt.
Heat ghee, pop the mustard seeds and cumin seeds, and add the dried red chilies and asafoetida.
Pour the tadka into the tomato broth.
Simmer 2 minutes and serve hot as a tangy soup.