1. Dry roast the ingredients from 1 to 5 separately until each of them are golden brown.In case of the red chillies until they grow darker red.Keep aside to cool.
2. Once the roasted ingredients are cool,grind this into a fine powder.
3. Soak the tamarind in water for a minimum of about 20 minutes.
4. Cook the tur dhal in a pressure cooker until soft.
5. Extract/press out all the juice/pulp out of the tamarind and throw away the fiber and seeds and keep the juice/pulp aside.
6. Heat oil,add the mustard seeds,when the mustard seeds splutter,add the curry leaves.
7. Add the onion and saute until transparent.Add the rest of the vegetables,the salt and the sambar powder and saute for a minute.
8. Add the tamarind juice and boil until the vegetables are fully cooked.
9. Mash the cooked tur dhal and add to the boiled tamarind juice.
10. Add the ground powder made of the roasted ingredients.Break out any lumps if formed.
11. Adjust water to achieve required consistency.Let it all boil for a minute or two.
12. Garnish with cilantro.
13. Serve hot with rice and dry curry of choice or with dosa/idli/vadai.Serves about 3-4

Courtesy: http://veginspirations.blogspot.com/