For white dhokla :1/3 idli or dosa batter,1/3 cup dahi ,1/4 tsp hing,1tsp oil,1/8 tsp black pepper powder,1/2 sachet of eno fruit salt,salt to taste.
For yellow dhokla:1/4 cup besan,1/4 cup rava or sooji,1/4 cup idli or dosa batter,1/4 cup dahi,1/4 tsp haldi,1/4 tsp hing,1 green chilli finely chopped ,1/4 inch grated ginger,1tsp oil,1/2 sachet eno fruit salt,salt to taste.
For green chutney : A bunch of hara dhania( fresh coriander),1 green chilli,1/4 piece of ginger,2 tbsp dry roasted peanut powder or 2 tbsp daalia or roasted gram ( roasted chana with skin removed ) ,1 tsp lemon juice,1 tsp cumin seeds,salt to taste.
For vagar : 1 tbsp oil,1/2 tsp mustard seeds,1/4 tsp hing,1/2 tsp white sesame seeds,few kadi patta.
Method : Soak white & yellow dhokla batters in the night by mixing the batter with dahi & oil and batter with besan ,rava ,dahi & oil respectively..Both the batters must have drop down consistency or in other words idli batter consistency.Keep them both overnight.
In the morning ,add the grated ginger & finely chopped green chillies,black pepper powder salt ,hing & haldi to the respective batters.Remember to add haldi only for the yellow dhokla batter.No haldi for white dhokla. Keep aside.
For chutney,grind together wash & finely chop hara dhania & green chilly..In the mixer, add the dry roasted peanut powder,finely chopped hara dhania,grated ginger,green chilly,jeera ( cumin ) ,salt & lemon juice.Blend all nicely into a paste.
Now, take a flat vessel with sufficient height for sides so that the dhokla does not spill.Grease the inside of the vessel with oil.
Take cooked & put sufficient water into it-nearly 1 inch.Put the gas on so that the water in the cooker gets boiling .Keep a stand in the cooker so that the dhokla vessel can be kept on that.
I wanted white dhokla at bottom of sandwich.So take white dhokla batter.Add eno in little water .It will froth.Immediately add it to white dhokla batter & mix.Pour this into the greased vessel.See if the water in the cooker is boiling.Now keep the vessel on the stand.Close the cooker lid & let it steam for 3-4 minutes.
Put off the cooker.Let it cool for 5-10 minutes.Remove lid & take out vessel.
Take chutney & spread it evening on the white dhokla batter which has partly cooked .Spread chutney evenly all over the surface of the white dhokla.Meanwhile add eno water mix to yellow dhokla batter & mix.Pour the yellow dhokla batter on to the chutney which has been spread over white dhokla. Put on the cooker lid.Light up the gas .Steam for 10 minutes.After five minutes,remove lid & insert knife to see if dhokla is ready.If knife is clean ,it is ready.Otherwise steam for 5 more minutes.
Prepare vagar by heating oil.Add mustard seeds .When they splutter add , jeera followed sesame seeds.Add kadipatta. Add hing.Put off the gas.Pour this vagar on the dhokla.
Cut the dhokla into desired shapes & serve.I cut up the dhokla sandwich & then tried to turn it on to a plate & the white & yellow dhokla pieces separated So ,next time around,I will get the entire dhokla upside down & then add vagar .Then only will I cut it.
Optional : Finely chopped fresh dhania can be a garnish for this.Optional as I am too lazy to clean up the dhania.