Wash the Urad Dal and methi in water for 2-3 times.
1 Cup Urad Dal
Separately wash the rice in water for 2-3.
3 cup Idli Rice / Ukda Chawal
Soak the Urad dal and methi in one bowl, and Rice in another bowl.
1 tablespoon of Methi Dana, 3 cup Idli Rice / Ukda Chawal
First grind the Urad dal with minimum water to fine and fluffy consistency.
Grind the rice too with minimum water.
Add 1/4 tablespoon of salt and mix everything with hand for at least 2-3 minutes.
1/4 tablespoon Salt
Keep it in a warm location for 8-20 hours (depending on location, read above)
Once fermented make Idlis or Dosas as required