Measure poha(aval) first and take it in a bowl. Rinse it well then add water to it, water should be at least 2 cms above the poha. Soak for 30 mins. If its thin poha just 10 mins should be enough. I used thick poha so soaked for more time.
See now the water is completely absorbed. Now mash it well with a potato masher, if its thin poha you can just mash it with your hand itself. Set aside.
Take rock salt and green chillies in the mixer jar and grind it to a coarse paste. Add green chilli paste.
Add jeera and mix well. Now pinch small portions of the dough and place in a wide plate. Do this till the entire dough is over. You can even spread a white cloth and place the pinched portions.
Like this. Covered it with a netted cloth and dry under sun for 2-3 days.
Dry it in sun till there is no moisture, turn over in middle. After noon you can fan dry them. Then next day morning again sun dry it, repeat this process till its crispy.
Once dried completely, store in a clean container and use it as and when needed. Heat oil in a kadai / tadka pan and fry them till deep golden brown.
Serve Aval Vadam with any variety rice of your choice or have it as such .