After soaking the green mungdal in water for 2-3 hours, strain it and dry it in a plate for 20 minutes and remove as much water content as possible.
Now add ginger chilli paste, lemon juice, garam masala, salt and crush it in a mixer jar. Then spread the batter on the inverted side of a dish, leaving some edges. Now heat the water in a patili, Set this plate on the pan in such a way that the batter is directly facing steam, cover the plate as shown below.