In medium saucepan, combine mushrooms, broth, and barley. Bring to boiling; reduce heat. Cover and simmer for 5 minutes. Add green beans; cover and simmer for 5 to 7 minutes more or until barley is tender and vegetables are crisp-tender. If necessary, drain.
Stir the chopped tomato, basil, rosemary, salt, and red pepper into barley mixture. Heat through. Serve with the tomato slices. Sprinkle individual servings with Parmesan cheese.