First wash the tomatoes ans green chilies and tamarind.

Take a pan add 2 tsp oil and fry the green chilies, then the tomatoes they should get mushy.

Then also fry the tamarind so it gets soft.

Take a grinder add all the ingredients add salt and cloves also and grind.

You can temper it if you want with curry leaves, mustard, cumin, channa dal etc.