In a Dutch oven, saute the celery, onion and garlic in butter until tender. Stir in the water, tomatoes, lentils, barley, bouillon, oregano, rosemary and pepper; bring to a boil. Reduce heat; cover and simmer for 40 minutes or until lentils and barley are almost tender.
Add carrots; simmer for 15 minutes or until the carrots, lentils and barley are tender. Sprinkle each serving with cheese if desired.