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In a large non-stick or lightly oiled pot, steam-fry the carrot, celery and garlic in their juices for 3-4 minutes. Add the beans, broth, parsley and marjoram. Cover and simmer over low heat for 5 minutes.
Meanwhile, cook the pasta in the boiling water until al dente. Drain the pasta and add to the pot with the vegetables. Taste for seasoning. Serve in bowls with a sprinkle of parsley and soy parmesan and crusty bread on the side.