For preparing paruppu rasam - brahmin special, first wash tuvar dal and boil it with 3 cups of water with a pinch of turmeric powder in pressure cooker.
Cut tomato and boil it in tamarindwater by adding turmeric powder, salt, rasam powder and red chilly powder. Keep cooking for sometime so it boils well.
Take the boiled tuvar dal from the pressure cooker and add water to it so that it becomes more watery. Now add this liquified tuvar dal to the 3rd step mixture.
Add asafoetida and jaggery. Cook this till foam appears and stop cooking immediately. Care should be taken not to over boil.
Fry mustard seeds and jeerakam in ghee and add this to the mixture of step 5.
Add coriander leaves for good flavor. Paruppu rasam - brahmin special, is ready to be served.