There are many varieties of sambhar's made in south India , Some are made with veggies in it and some or not. I like all kind of sambhar made different method in south states , Like in kerala they grind coconut and added to sambhar, in andhra they roast and make a lentil with spice paste and add it the sambhar. I like all the sambhar varieties , some have mixed veggies, some can be prepared with single veggie just onion . Veggies which can be added to sambhar may depend on individuals taste for eg Bhindi, brinjal,drum stick, lima beans, carrot, beans, are some veggies and pulse (are only some) I use often in sambhar. Not to forget Mullangi is my all time fav in sambhar, I just love the flavor it gives in sambhar and I love them only in sambhar . My mom used have mooli as is with a meal like a onion slice , some people do eat Radish raw , I even can eat it but in salad form after giving the dressing for it ;). This sambhar is very simple , can be easily made by any one and taste yummy with steamed Rice and a poriyal or papadam as side.