Once upon a time, there lived Sambar and Chutney. They were best friends and wanted to spend all the time together but they had a problem. People either ate dosa and idli with chutney or sambar and not both often.
This made them sad. They thought over the problem and couldn’t find a solution. So they went to Milagapodi, the culinary king.
He listened and said “Hmmm. I know, What the problem is, since you are both side dishes people at times take only one. If they realize you both would taste great together, you would never be separate. So we will create a new dish called Sambar Idli. Now sambar becomes the main dish and chutney can be the side dish. They became very happy and once people tasted the dish with sambar and chutney together, a new tradition of always serving idly, dosa or vada with sambar and chutney happened.