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.
Dry roast chana dal and moong dal till slightly golden.
Soak it in water at least for an hr.
Drain water and transfer the dals to a mixer and coarse grind it. I did the grinding in batches. Make sure you grind it to a coarse mixture and not to a paste.
Now fill in a idli mould with this mixture and steam cook it for at least 15mins in low medium flame.
Roughly break it and run it again in the mixer, just pulsing will be enough. It should look like breadcrumbs in texture.
Heat jaggery syrup till it resembles honey in consistency. Add the ground mixture and keep mixing till all the moisture is absorbed.
Keep mixing and add ghee when it gets dried up.
Now add cardamom powder and give a quick mix. Fry cashews in a teaspoon of ghee till golden brown.
Cook till the entire mixture become dry and resembles bread crumbs in texture.
Add grated coconut and fried cashews and switch off.
Serve Okkarai hot / warm.