In a bowl, mix together rava, yogurt, ginger, green chillies, lime juice, and salt. Add ½ cup water and mix well to make a batter. Adjust the salt at this point. Set aside for 15 minutes.
To steam the dhokla, heat 2 cups of water in a pan and keep the trivet. Boil the water on medium heat for about 3-5 minutes by covering it with a lid.
Meanwhile, grease a round or square container with some oil and set aside.
Now, whisk the rava mixture for 1 minute in the same direction.
Add oil and mix well. Add Eno and 1 tbsp of water - add water over Eno to activate it. Beat the batter well until it becomes foamy. Do not over mix the batter.
Pour the batter into a greased container and gently tap the container 1-2 times on the countertop. Carefully place the container in the pan of boiling water.
Cover the pan with a lid and steam the batter for 12-15 minutes on medium-high heat.
Switch off the flame and let it sit in the pan for 5 minutes.
Take out the container from the pan and let it cool down for 15-20 minutes.
Run a butter knife around the edges of the dhokla to loosen it from the sides of the container.
Keep a plate over the container and flip it. The soft and fluffy dhokla is ready to serve.