When it comes to salad, Americans' love affair with the greens is slowly pushing aside the traditional preferences for the mayonnaise-based picnic fare of potato and macaroni salad. Green salads are no longer just a side dish - they are big business and also have a place in American eating history and culture. A Few Facts: Prepared salads and salad-based restaurants comprise a $300 million In spite of the growing greens industry, eight in 10 Americans don't eat the recommended amount of vegetables for a healthy diet. The Cobb Salad craze began in 1937, 1939 or possibly 1929, depending on which version of the story you...