Sweet Onion Soup

Though this soup can be made with ordinary Spanish or Bermuda onions, it’s particularly good with mild, sweet ones—Walla Walla Sweets from Washington State, Vidalias from Georgia, 1015s from Texas, Osos from Peru (a recent import), or the currently ubiquitous Maui onions from Hawaii. Be careful with the last-named, though. According to the Maui Farmers Co-Op Exchange, which markets about 65 percent of all Maui onions, the only ones that are truly mild and sweet in character are those from t