1-Grind the coconut, red chillies and tamarind.
2-Add green chillies and coriander seeds while the coconut mix is being ground.
3-Make a fine paste and add a little water.
4-For the seasoning, splutter udad dal, mustard seeds and curry leaves in hot oil and pour over the chutney.
5-Add salt to taste and serve with a hot, hot dosa.