(My Mom, Vimala Jain's recepie modified a bit for fluffiness)
Soak 4 cup idli rice for 4-5 hours.
Soak 1 cup urad dal for 4-5 hours with 1 tsp Methi seeds.
Grind urad dal first.
Grind rice separately with salt and 2 tsp lemon juice adding a cup of Pava and water to make idli batter consistency.
Mix both Batter and Let it ferment for another 6 to 8 hours.
Add crushed green chillies, 1 tsp turmeric powder to this batter.
Add 2 tsp Eno soda to the batter mixed in 1/4 cup warm water.
Pour batter in Dhokla stand and steam for About 20 minutes.
Cut into diamond or square pieces and let it cool for 20 minutes.
Seasoning:
8-10 tsp oil
1 tsp mustard and cumin seeds
8-10 curry leaves
1/2 tsp Hing
5-6 chopped green chillies
1/2 cup chopped cilantro
1 lemon.
1 tsp Sesame seeds ( optional )