Heat Ghee in a pan. Fry Chana Dal, Urad Dal, Cumin Seeds and Cashews on medium heat for about 20-30 seconds.
Then, add semolina. Roast it on medium heat, constantly mixing with a spatula, for about 5 minutes.
Transfer it to a mixing bowl and let it cool.
When the semolina cools, add salt, flax seeds and wheat bran. Mix.
Add yoghurt and water and mix well. Cover and rest it for about 10 minutes.
Now, add baking soda and mix. Immediately, pour the batter on greased idli plates and steam the idlis on high heat for 15 minutes.
Once done, remove the plates from the steamer and let the idlis cool for 2-3 minutes.
Sprinkle some water and use a spoon to remove the idlis.
Serve hot with any chutney of your choice.