Combine rice and fenugreek seeds. Wash and soak them for 6-8 hours in 5 cups of water.
Wash the lentils and soak them for 6-8 hours in 2½ cups of water.
After 8-10 hours, you will see that the grains have swelled up.
Grind them separately. Then combine and mix well. If needed, add water.
Cover and let it ferment for 8-10 hours in a warm place.
After 8-10 hours, you will notice that the batter has risen. Mix well.
Add salt. Add water if needed and adjust the consistency.
Heat water in the idli steamer and let the water bubble and boil.
Grease the Idli plates. Pour the batter into each section of the idli plate and steam the idlis for 15 minutes on high heat.
After 15 minutes, turn off the heat and let the idlis stay in the idli steamer for about 5 minutes. After 5 minutes, remove them. Place them on the kitchen counter. Sprinkle some water. This will ease removing the idlis.
Remove and serve with sambar and/or chutney.