In a mixing bowl, add coarse gram flour, grinded poha powder, salt, turmeric powder, hing, green chili pastes and ginger paste. Mix well.
Then add buttermilk gradually and make medium thick and ribbon-like pouring consistency of the batter.
Now add 1 tbsp oil and mix well and whisk the batter for 1-2 minutes.
Cover and rest the batter for 30 minutes.
Then in a batter, add 1 tsp eno fruit salt and some lemon juice. Mix well.
Now add batter to grease plate and steam khaman on high flame for 15 minutes. (refer to video)
Once done take out the plate from the steamer & allow it to cool for 5-10 min.
Demold it and Cut it into desired shape.
Now heat oil in tadka pan, add mustard seeds, chopped green chili, hing, and curry leaves. Mix well and add tadka on khaman dhokla. Mix well.
Serve vatidal na Instant khaman with chutney.