There are many varieties in dosai and idly but to make this we need to have a good batter. How to make a good batter?

Idly is a one of the hot favorite South Indian Breakfast! It is a quick and delicious comfort food that it is prepared in every household at least once in a week, which is made in rice flour, urad dal and fenugreek seeds. Here is the measurement for the good idly/dosai batter.
Ingredients:-
Idly rice – 2 ½ cup
Urad dal – ½ cup
Fenugreek seeds – 1 tsp
Salt – to taste
Water – to grind the mixture
Method:-
Soak the rice for 8 hours or over a night. Same way soak the urad dal and fenugreek seeds for just ½ hour before you grind. Once it is done, wash the urad dal, fenugreek seeds and add water and grind it very fine batter/paste and keep aside. Then wash the rice and add water and grind into a paste (it should not be too fine paste). Once it is done mix both the mixture and add salt. Leave this mixture to the room temperature to ferment (you can leave over night). The next day you can mix it well and prepare idly / dosai. If you need to add salt you can add to it.
Note: Don’t add too much water, you won’t get good idly/ dosai.