Select and pluck the tender stems of the cauliflower, wash and chop them. Keep aside.
Heat oil in a pan, add cumin seeds, sesame seeds. Saute them for a minute. Once cool, grind them to a fine powder.
In the same pan, heat 1 tsp oil and then add chopped cauliflower stems, chopped green chillies and salt. Cook them for 2 mins. Ground them into a fine paste by adding tamarind juice and the ground powder.
If you feel it is too thick add a little water. Transfer to a serving bowl.
Prepare the tempering with 1 tsp oil in a pan. Add mustard seeds, black lentils, red chillies and curry leaves, asafetida and sauté for a minute and immediately pour over the chutney. Mix well.
Serve it with hot rice.