Slice 500g of onion into 1cm thick pieces and dissolve the overlapping onions one by one

Spread evenly on a sieve and dry. Remove the dirty outer leaves from the onion peel and use the inner leaves

The broadcast says it dries up in a day, but after a year of trying to dry it, it's impossible to do it in a day. It takes at least three days even if the weather is good. I dried it with solar heat for two days and finished it with a dryer. If you use a food dryer, the enzymes of onions will be destroyed at 70 degrees. Set the temperature to 50 degrees for onion enzyme retention

To make onion vinegar, you need dried onions, brown vinegar, and raw sugar.

Add raw sugar to brown rice vinegar and dissolve it well.

Put dried onion and onion skin into a glass bottle that was sterilized and dried
Fill it with vinegar.

It is sealed and aged in the shade of the veranda for two to four weeks.

This is what onion vinegar looks like in 4 weeks. The onion skin made the color a little darker and ripened.