Soak jaggery in warm water(till immersing level) , crush it well. Then heat it up until it is slightly thick (no string consistency needs to be checked). Strain and keep aside.(I made more than above mentioned quantity for storing purpose).
In a mixing bowl add rice flour, salt and mix well. Boil water and add it little by little.
Mix with a ladle, once it forms together and is a bit warm to handle then use your hands to knead it a soft dough. Do all this off the stove.
Dry roast moong dal in low flame till golden. Then add water and let it cook until soft and mushy.
Mash it well with a masher.Then add jaggery syrup and let it boil.
It will splutter so be at a safe distance. Let it cook until the stuffing becomes thick, you should be able to form a ball that's the correct consistency. Add ghee, Switch off and set aside.
First cut small squares of banana leaf and keep it ready. Grease each banana leaf with little oil. Pinch a lemon size ball from the dough, place it on a banana leaf and flatten it to a thin disc. On the right half of the disc, add a heaped spoon of stuffing and spread it.
Seal it along with banana leaf so that it forms a semi circle. Press the edges so that its sealed completely.
Repeat the process until the entire dough and stuffing gets over.
Carefully pile up all the banana leaves in a steamer and steam it for atleast 10-12mins or until the kozhukattais are shiny.
I had little leftover outer dough so made them as mini kozhakkattais and steamed it along with elai kozhakattai.
Serve Elai Kozhukattai hot / warm!