Take a jar and add Oats, Poha/ flatten rice, Semolina and dry grind it into a fine powder.
In a mixing bowl put grounded flour, rice flour, yogurt, salt to taste and mix it well.
Add water gradually to make a medium thick smooth batter just like idli batter. Do not add water at once otherwise batter might be become very thin in consistency. The consistency of the batter should be pourable.
Mix it well with spoon so that there should be no lumps in the batter.
Take a non-stick pan and heat the pan on medium flame. Do not make the pan too hot otherwise batter will not stick to the pan, once the pan becomes slightly hot pour 2-3 spoonful batter towards the center and spread the batter evenly in a clock wise.
Drizzle little oil all around and top of the dosa, cook for 2-3 minutes from downwards on medium flame till it becomes brown and crisp.
After 2-3 minutes remove the sides, flip it over and cook from other side too.
Once both the sides get cooked and dosa become brown and crisp remove it from tawa and in the same way spread the rest of the batter to make dosa.
To make spicy dosa spread the batter with the spoon in a circular motion and sprinkle some finely chopped green chilly on top, slightly press it with spatula so that it gets stick with the batter.
Drizzle little oil all around and top of the dosa, cook on medium flame till it becomes brown and crisp.