Pressure cook the toor dal with enough water.
We can cook the tamarind with little water or in an open vessel with enough water.
Mash the tamarind and extract the juice from it.
In a pan, add ghee and splutter mustard seeds. Once they crack, add cumin seeds and saute until it turns golden brown.
Add the chopped tomatoes and little water.
Into this add turmeric powder, jaggery, salt, rasam powder, cumin seed powder, asafoetida and curry leaves so that the flavour goes well into the rasam. Mix well with tomatoes and cook it with little water.
Once the tomatoes are soft, add the tamarind extract and add water.
Keep it in medium flame and cook until you see he froth on the top.
You will start enjoying the aroma of the rasam at this stage.
Now add the mashed toor dhal, cook for few min and switch off the stove.
Garnish it with fresh coriander leaves.