Rasam is a traditional South Indian soup served with rice. Earlier rasam was known as milagu thannee (literally meaning pepper water). During the colonial period this recipe was tweaked a little and known as mulligatawny soup. Even today, every south Indian finds this soup as a comfort food, and our lunch is incomplete without taking rasam. We prepare a different varieties of rasam using various spices, fruits, and lentils. Lemon rasam is one of the easiest rasam recipes and also one of the most delicious rasams.