Take a wide bowl, add ragi flour and semolina to it. Put salt and curd to it. Mix it well, keep the batter aside for half an hour.
Chop the onion finely and grate the carrot.
Make seasoning, take oil in a small pan, add mustard seeds, as it crackles, put cumin, cashew pieces, broken chilli, a few curry leaves, pour it over the batter.Add veggies and chopped coriander. Adjust the consistency by adding some water.
Put water in the idli pan and heat in on a low flame.Meanwhile, put the soda powder to the batter, mix it and put it to the moulds.
Steam it for fifteen minutes on moderate flame., then on low heat for five to ten minutes. Check if it is done. Switch off. Unmould after sometime.Serve with coconut chutney.
Notes
Sour curds is mandatory.
Addition of veggies is optional.
Once the baking soda is added, immediately put it in moulds and steam it.