In Kerala, Tomato rasam/Thakkali rasam is mostly served in Onam sadya. Basically Kerala style rasam can be done easily with instant rasam powder or with freshly ground spices. I was looking for a simple and easy rasam recipe without rasam powder. It came out super delicious and flavorful. After a long time, myself and Raksha had a plateful of rasam rice along with our favorite side dish papadam. Do try this yummy Kerala Rasam for this Onam sadhya and enjoy like me. Lets see how to make Kerala thakkali rasam without rasam powder.