Dry roast oats evenly in a pan or kadai such that they are aromatic and slightly brown in color. Take care not to burn it, keep aside.

After they are cooled , transfer oats to a mixer and grind to powder .

Add sooji , rice flour , jeera and pepper to oats powder and pulse them 2-3 times so that they all blend together nicely and jeera - pepper crushes a bit .

Transfer the pulsed oats dosa flour mix to a mixing bowl . You can store this mix in an air tight container too and use it as and when required .

To the dry oats dosa flour mix add coriander leaves, curry leaves , chilli , ginger and salt .Don't add onion .

Add buttermilk / curd + water to the flour . Mix everything well such that there are no lumps .

Add adequate water to the oats dosa mix and check the consistency . The batter should be thin like that of rava dosa batter.Let the dough sit for 5-10 mins.

Heat a tawa or nonstick pan. When the tawa is hot , rub it with a drop of oil using an onion piece. Sprinkle onion pieces .

To the hot tawa pour a ladle full of ragi dosa batter in circular motion.Start pouring the batter from the outside rim of tawa to inwards center of tawa. As the batter is thin ,it will become lacy .( The method of pouring this dosa is similar to rava dosa)  .Smear a few drops of oil around the dosa.

Lid the pan and cook it on a medium flame.Cook till bottom side starts to turn golden brown.Once it becomes crisp ,just fold and serve . No need to flip .

Remove from tawa and serve hot Oats dosa with chutney / chutney powder or sambar.