1. In a mixer put together half an onion (chopped), 5 to 6 garlic cloves, 1 sliced brown coconut (dried), chopped fresh coriander leaves, salt, yoghurt, green chillies and 4 to 5 curry leaves (torn).
2. Add a quarter cup of water and process in the mixer till smooth.
3. To prepare the seasoning, heat a tablespoon of oil in a pan.
4. Fold in the black mustard seeds and few curry leaves.
5. Allow to splutter. Once it stops spluttering, add the mustard seeds and curry leaves seasoning to the processed mixture.
6. Allow to come down to room temperature by cooling on the kitchen table or countertop.