Grind the oats to make oat flour
Whisk well. Ensure there are no lumps
Add all the other ingredients and water and mix well
Make a thin batter which is the consistency of milk
Let the batter rest for 20 minutes. This helps soak the oat flour and sooji/semolina and swells it up
Heat a dosa tava/non stick skillet. Mix the batter and pour it with a ladle from the inside out. As the batter is poured, it should immediately start forming little bubbles. Fill any gaps with a little more batter. You'll see small holes forming in the dosa which is perfect.
Sprinkle oil or ghee around the periphery and the middle of the dosa
Cook the dosa on a medium flame for 2-3 minutes till you see the edges browning and start to separate from the pan.