Onions are believed to have originated in Asia. When the Israelites were in the wilderness after being led out of Egypt by Moses, they yearned for onions and other vegetables they were used to eating. Onions were used by the Egyptians as offerings to their gods. They were fed to the workmen who built the pyramids, and Alexander the Great gave onions to his troops to promote their valor. The odoriferous onion and the dainty lily are members of the same family, Liliaceae. The substance that gives the onion its distinctive odor and flavor is a volatile sulfurous oil which is about half eliminated by boiling. This volatile oil is what causes tears. Holding onions under cold water while peeling them prevents the oil fumes from rising, so use water and spare your handkerchief. Onions lose approximately 27 percent of their original ascorbic acid (vitamin C) after five minutes of boiling. There are two classes of onions-strong and mild. The early grown onions are generally milder in flavor and...