10 hours ago, blue_dolphin said:
My perspective is that simple, natural preservatives like salt, vinegar and sugar plus spices and herbs can transform fresh, organic produce into flavorful pickles and preserves extending their useful life for weeks, even months, depending on the particular fruit or vegetable and how they are processed.
Agreed.
I pickle young ginger slices as served in many Japanese sushi restaurants as a tongue cleanser. No unpronounceable ingredients involved; just rice vinegar and salt.
Stays in good condition for months, not that a batch often lasts often; I eat it too often!
I see no reason why you couldn't do the same with onions of any colour.