Boil the water on high flame in a medium sized pot.
While that’s boiling, grind green chilies into fine paste in a blender/food processor.
Once the water comes to full boil, reduce the flame to medium to slow, add the green chilies, cumin, ajwain, sesame seeds, turmeric powder, and salt. Green chilies will make you sneeze or cough when you add it to the hot water. Just be cautious. May be cover your nose.
In few minutes, add the baking soda, followed by the rice flour. As soon as you dump the rice flour, start whisking quickly to avoid any kind of lumps. The dough will start coming together and thickening up almost immediately. At this point remove it from the flame. Make sure to whisk it thoroughly again to remove any lumps that might be still there. Sometimes, I will use back of a spatula to break the lumps.
Boil some water in double boiler, instant pot or pressure cooker.
Put a stand/trivet inside it.
Grease two containers/baking pan with oil (with depth). Divide the dough into them. I use two containers and then stack them inside the instant pot. Depends on how thick you want the pieces to be cut. Spread the dough in the greased containers and then put the container on top of the trivet in a way that the water in the instant pot/double boiler does not touch the dough containers.
Close the lid, let it steam for 20 minutes without whistle if you are using pressure cooker, (instant pot high mode, npr), if using a double boiler make sure to cover it.
After 20 minutes, it should be a little bit more set, once the pot cools down a bit, carefully remove the container from the pot.
Try to unmould it on a chopping board, cut square pieces and serve it. If you do not want to unmould it, then you can remove it in a serving plate using a spoon.
Garnish it with cilantro, and serve it with the sides or as it is. Ideally served piping hot or warm.