In a bowl, add rice, chana dal and urad dal. Wash and soak it for 4-5 hrs.
Remove water and add soaked dal and rice into the mixture jar. Also, add ½ cup sour curd and some water. Do not add more water while grinding the batter.
Grind it into a medium thick and smooth paste.
dhokla batter is ready. Cover and ferment batter for 4-5 hrs or overnight a warm place.
Batter becomes fluffy and properly fermented.
Then in a batter, add salt, hing, green chilli paste, sugar and oil. Mix well.
Take out some dhokla batter into another bowl.
Now add baking soda and lemon juice. mix well.
Grease dhokla plate with oil & pour the mixture into the plate.
Steam in idli-dhokla steamer or kadai for 12-14 min on high-medium flame.
Once done take out the plate from the steamer & allow it to cool for 5-10 min.
Cut into a square shape. keep it aside.