Cipolla Rossa di Tropea in Agrodolce

I love pickling vegetables, especially the red onion from Tropea, in Italy. It is a particular onion that grows only in Calabria, around the town of Tropea, from which it takes its name. It has a stronger flavour and is much sweeter in taste and aroma than other red onions. It is not as red as the others, but it is perfect to make jams with. Its sweetness is one of the reasons why I love to pickle this particular onion. It can be preserved for months, and is a great acc