Wash and soak green moong dal and rice in slightly hot water for 3-4 hrs.
Remove water and add the mixture into the grinding jar. Then add green chili, ginger, garlic, cumin seeds, ajwain, hing, coriander leaves, and 2-3 tbsp water.
Grind it into a smooth and thick paste.
Now, whisk the batter for 5 minutes till it becomes light and fluffy.
Then add salt, black pepper, sugar, lemon juice, and oil. Mix well.
Now add baking soda and some water. mix well.
Then in a deep bottom vessel (big patili) add 3 cups of water and bring to a boil.
When water comes to a boil, place a greased plate on it and add batter with a spoon. (refer to video)
Cover and steam the nasta on high flame.
It should take 7 minutes to properly steam. Check with a knife, if it comes out clean then it is properly cooked.
Allow it to cool for a while. You can enjoy steam nasta peanut oil and achar masala on it.
Or for tadka, in a pan add oil, mustard seeds, cumin seeds, sesame seeds, chopped green chili, curry leaves, and a pinch of hing. Sauté it.
Then add steamed nasta and mix well.
Garnish with coriander leaves and serve.