This broth gets its flavor from two members of the onion family, Spanish onions and leeks. Be sure to wash the leeks well, since they often come with quite a bit of sandy soil hidden among the green leafy tops.
Tuna salad is one of those things that's hard to resist, so this recipe makes a single serving to help you with portion control. If you are making this for more than one person, just multiply the ingredients times the number of servings you need.
Gazpacho is a cool Spanish summer soup sometimes called "salad in a bowl." This easy version is based on tomato juice and topped with freshly made garlic croutons. Serve the soup ice cold, in chilled bowls.