in a mixing bowl take salt , jaggery, rasam powder, grated coconut and onion ( if you are adding ) . As said earlier, the addition of onion is optional.
Mix nicely using your hands crushing it a bit such that onion and coconut leaves little moisture .
Add thin poha .Mix well with your hands. Moisture from onion and coconut should help it to become little soft. Let it sit for 5-10 mins so that it absorbs flavor . However, if you want to serve oldies and kids, you can drizzle just a few drops of water and mix to make it little more soft.
After mixing poha and masala .. this is how it looks . I have sprinkled 4-5 drops of water.
Lastly prepare a tempering of Mustard , Urad dal, curry leaves and 1-2 slit green chilli ( optional) . Pour it on the poha and mix .
That's it super easy Avalakki Upkari is ready to enjoy .