Wash and soak the dals and rice for about 5-6 hours or overnight.
Drain off the excess water and blend them into a thick batter using a blender. Tip – Use minimum water while blending so that the batter is of a smooth paste consistency.
Transfer this batter to a bowl and keep it aside for 6-8 hours for fermentation.
After the fermentation process, pour the batter into a bowl, add turmeric powder, salt, green chili-ginger paste, and warm water and whisk the mixture. Use water to adjust the batter to a thick and pouring consistency.
Grease a plate with oil and keep the steamer/cooker ready.
Pour the batter onto the plate evenly and steam it in the cooker for about 15 minutes. To check, you can prick in the Dhokla using a toothpick or knife and if it comes out clean, the Dhokla is done.
Cool it down and cut the dish into cubes.