Heat olive oil in a large saucepan over medium heat. Add carrots, celery, zucchini, and onion; saute until the vegetables are soft, about 10 minutes. Add garlic and rosemary; cook, stirring so the garlic doesn't burn, for another 2 minutes. Add tomatoes, potatoes, and chard.
Bring to a simmer and cook until the chard is wilted, about 5 minutes. Add beef stock and beans, bring to a simmer, and cook until potatoes are tender, about 15 minutes.
