This soup recipe is based on a traditional pasta dish that consists of lots of parsley, garlic, chopped walnuts, hot chile and olive oil, all fried up and tossed with pasta. We amped up the greens, made the pasta a nutritious supporting player and turned the recipe into a soup. It's best served immediately, because the orzo will absorb liquid as the soup is held. Thin any leftover soup with more vegetable broth, if desired. Recipe by Anna Thomas for EatingWell.