Rinse and wash raw rice with water , 2-3 times till water runs clear.Soak rice for 4-5 hours.
Wash fenugreek seeds and soak in enough water ,separately for 4-5 hours.
Soak cooked rice or poha ,separately . You can even skip this ,its optional.
After 4 hours , drain water ( refer notes) completely from fenugreek seeds and raw rice , keep it aside.
In a wet grinder or wet mixer jar , add fenugreek seeds and grind well to a smooth paste, adding little water part by part.
Now , add soaked raw rice and cooked rice and grind to a fine paste.
Transfer it into a bowl , add salt.
Mix in well with your hands, close it with a lid and allow to ferment in warm place for 10-12 hours or overnight.
After 10 - 12 hours, check the batter you can find small bubbles . Stir and mix well with ladle.
Heat a dosa tava / griddle , pour ladle full of batter and swirl to desired size and thickness. Cook dosa on a medium heat
Close the lid for 30-40 seconds , remove lid and drizzle ghee/oil.
Once it looks crisp from the bottom , fold, remove and serve hot.