Dry roast moong dal till slightly golden. set aside.
Boil water, once it starts to boil vigorously add roasted moong dal, little salt and let it cook in low flame.
The grains should be separate but when you press each dal, it should be soft that is the correct way to cook moong dal for sundal. This may take just 3-5mins. Switch off, strain water and set aside
Dry roast the ingredients listed under 'To roast and grind' until golden brown, Cool down then transfer to a mixer jar. Grind it to a coarse mixture, set aside.
In a pan heat oil - add the items listed under 'to temper' let it splutter.
Add the spice powder, required salt and hing. Cook for few mins then add coconut.
Cook for 2 mins then switch off, Cool down. Meanwhile you can prepare the outer dough. Measure take rice flour in a mixing bowl, add salt.
Mix it once. Boil water until it bubbles up add it to rice flour.
Mix with a ladle, once it starts to come together, set aside for few mins until it is warm enough to handle with hand. Now bring everything together to form a smooth dough without any cracks.
Now the stuffing and the outer dough is ready. Take your mould grease it with oil, grease your hands too. Fill both the sides with the dough as shown below.
On the side where you are going to place the filling, press it inwards so that it resembles a cup to hold the stuffing. Now add the sundal filling, carefully close it from right to left. Press it well.
Now open, remove the extras, now the shaped kozhukattai is ready to steam.
Likewise shape all the kozhukatais with stuffing, place it on the steamer plate. Steam it for at least 8-10mins or until the kozhukattai looks shiny on the outside and does not stick. Switch off and remove the kozhukattais and transfer to plate / serving bowl.
Serve Sundal Kozhukattai hot / warm!