Lemon Rasam with step by step pics, tips and video. Lemon Rasam is also know as నిమ్మకాయ చారు / nimmakaya charu in Telugu, elumichikai rasam in Tamil. It is South Indian lentil based soup which is lite on tummy and very soothing too. We have this lemon rasam with hot steamed rice with some veggie fry and papads. It is very easy to prepare this rasam.