Heat oil in a pan, fry shallot, ginger, garlic and green chilli slightly. Add turmeric powder and buttermilk. Stir continuously until the steam comes. Do not let it boil. Remove from fire and stir for another 5 minutes. Add salt.
Heat oil in a small pan, fry mustard seed, fenugreek seed, cumin seed, red dry chilli and curry leaf, add to moru kachiyathu. Serve with rice.