Rasam is a curry in light consistency form that is often consumed as a Soup or as a Gravy in most parts of India. It tastes good when it is hot. In South India, a full meal starts with Sambhar & Rice, then Rasam & Rice and then to Sweet Dish & finally Curd.
The main advantage of this delicacy is that it helps to reduce the acidic levels in your stomach.
A spicy version of rasam is best used to treat Cold and Fever so that nasal congestion ease up and helps the digestive & excretory system to break down the food & throw out harmful elements out of the body.
Having rasam twice a week is best for the body. You can have it like a soup or with rice/dosa/idly.