Wash and soak the parboiled rice, fenugreek seeds, and raw rice overnight. Wash and soak urad dal separately overnight.Grind the urad dal and cooked rice to a very fine paste. Add a little water while grinding. Remove and keep aside in a big vessel. Then grind rice with a little bit of water. Then mix with dal paste and add salt to taste. Cover and keep aside for a minimum of 5 hours.Now heat a non-stick pan and then pour a ladleful of batter on it. Cook for 2 minutes on medium heat. Turn the other side and cook till golden color. Repeat the same with the rest of the batter.