First of all put semolina in a bowl then add in sour curd and water as per required, cover and keep aside for 10 minutes.
After 10 minutes add in finely chopped carrots, cabbage, capsicum, salt, ginger chilli paste in batter and mix well.
Now heat oil a tadka pan, when oil gets heated add in mustard seeds and let it slather, now add in split black gram and curry leaves and add this tadka to batter and mix well.
Now grease idli mould with oil nicely, add fruit salt in batter and put batter in greased idli mould, now put fried cashew nuts and peanuts on top of it and put the mould in steamer.
Steam the idli for 8-10 minutes, after 8-10 minutes take out the mould from steamer and let it cook for few minutes.
When it gets cool un mould the rava idli from mould using a knife or spoon and serve the delicious idli with onion-tomato-garlic chutney and enjoy.