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Vinegar is used to preserve a wide variety of vegetables and fruits, along with meats, fish and eggs. Preserving food with vinegar is called pickling. A short list of foods â¦ that are commonly pickled would include pigs' feet, herring, beets, cucumbers, onions, olives, peppers, peaches, pears, and watermelon rind.o preserve food the pioneers used salt, and vinegar and they could have sun dried the food and they might have had root cellars to keep the preserved food edible and cool.
A. Vinegar is indeed a product of wine that has gone bad. In fact the word vinegar is from the French words vin aigre which translates to sour wine.. Just as yeast consuming the sugars in grape juice creates alcohol as a by-product, bacteria known as acetobacteria consume the alcohol in wine and create acid.hat's why red wine vinegar tastes different from champagne vinegar. Vinegars are often further flavored with additional ingredients such as herbs, or -- like balsamic vinegar -- through aging in wooden barrels.