Prepare soup mix according to on-pack preparation instructions and set aside.
Heat the oil in a large pot and add onion, bacon, carrots, celery and garlic, cooking until onion is just tender.
Pour in the stock, water, Soup Mix, potatoes and herbs. Bring to the boil and simmer for approximately 45 minutes.
Add zucchini and silverbeet and cook for a further 5 minutes until vegetables are tender. Season to taste and serve with parmesan.