In Blr. We get Awala or gooseberry almost all the year round. Yet the Awala in winter is the best. I bought some to make Nellikayi Chitranna and there were at least 5 more left. I had never made Awala supari ever but had seen my aunt make it. It is as simple as chop in to bits, sprinkle salt and dry it in the sun. This fruit does not release much water even after salting so you can just mix the salt into the bite sized pieces in a plate and keep it out in the sun. To get completely dried Awala supari you will have to leave it out for at least 3 days under the strong sun.
Store the dried Awala supari in a clean dry airtight box.
It is tart and salty when eaten as is but drink water after it and you sense the sweetness on the tongue. For people who do not know what is supari, it is mouth fresher. Like you all know that Awala is a power source of vitamin C but in this form it acts as a digestive too.
Go ahead make your own.