Clean and soak the rice and urad dal along with fenugreek seeds in some water in separate bowls for 5-6 hours.
Now grind the urad dal in your food processor with enough water to make a smooth batter. Next grind the rice with water.
Transfer the content in a pan and add some salt to taste and mix it well. If you feel the batter is too thick add some more water and keep it outside overnight or for minimum 6-7 hours for fermentation.