Tender lentils slow-simmered with warming turmeric, finished with a sizzling tarka of golden ghee, roasted cumin, and fresh coriander.
Heat the oil, pop the mustard seeds, curry leaves and green chilies.
Add the ginger and coarsely crushed peppercorns, and sauté a few seconds.
Add the water and salt, and bring to a gentle boil.
Lower the heat, stir in the buttermilk, and warm gently for 2 minutes without letting it boil.
Remove from heat and serve warm with rice or as a light soup.