Add oats to a blender and make a coarse powder. Set it aside.
Heat ghee or oil in a pan. Add cumin, mustard, urad dal and chana dal and fry the dals until they turn golden.
Then add green chillies, hing, ginger and curry leaves and saute for 30 seconds.
Now add suji and fry until aromatic.
Add powdered oats and fry until the mixture turns aromatic. Add salt and mix well.
Now let it cool.
Preparing Batter
Once cooled down, add curd and water to the mixture. Combine them to make a thick batter and set aside for 5-8 minutes.
Now heat the steamer with 2 cups of water or as required. Meanwhile grease the idli stand with oil.
After resting for 8-10 minutes, the batter turns slightly thick. After this stage, add lemon juice and more water, if needed, to maintain the consistency.
The batter must be thick and smooth and not lumpy.
Then add carrots and coriander leaves. Mix it well.
Make sure water is hot. Sprinkle half tsp soda or 1 tsp ENO to the batter and mix it gently. Do not over mix it.
Make Oats Idli
Now fill the batter into a greased idli stand.
When the water in the steamer starts boiling, place the idli stand in the cooker and steam for about 11 minutes. Then turn off the flame.
Check the idli with a toothpick. Now remove the idli with the help of a spoon or knife.
Oats idli is ready! Serve it along with coconut chutney or sambar.