Take a pan, add ½ Tbsp oil , red chillies, cumin seeds, coriander leaves and sauté until the leaves are soft. Keep aside.
In the same pan , add the remaining oil and add tomatoes , green chillies to it. Cook until soft and done.
Add the coriander and red chillies mixture , also tomatoes and green chillies mixture with tamarind to a mixer.
Ground the ingredients to coarse paste. Take it out in a vessel.
In the same pan, add all the ingredients for tempering. Saute until the mustard seeds sputter. Add the seasoning to chutney.
This chutney goes well with rice and ghee or idli or dosa.