Wash and Soak the Rice, Dal and Fenugreek Seeds for 5-6 hours or overnight. Grind into a fine batter. Add salt and keep aside to ferment.
Pressure cook the potatoes for 2-3 whistles. Heat a pan with oil and add the mustard,urad dal, chopped ginger, green chillies, curry leaves and chopped onions. Fry for a minute and then add the spice powders and salt. Crush the potatoes slightly and add it to the masala. Mix everything well and add the chopped coriander leaves at the end. Potato Masala is ready.
Now heat a dosa tawa and add a ladle of batter and spread them to a circle shape. Spread the prepared masala. Sprinkle oil in the sides of dosa. Once cooked and crisp from underneath, fold and serve hot with sambar and chutney.
