Rasam Powder or Rasam Podi as it is popularly known in southern states of India is an integral ingredient in any South Indian kitchen pantry. Rasam is a kind of soup and any South Indian meal is not complete with either the rasam or the sambar. Every region of the south, be it Karnataka, Andhra Pradesh, Tamil Nadu or Kerala have their variations for making this spice mix. Note that here in this recipe, I have not added lentils, because I normally cook rasam with a little tuvar dal. But if you wish, you may add a couple of table spoons of chana dal and tuvar dal to the spice mix for grinding.