Pistou soup is a traditional Provençal soup that is similar to Italian minestrone. It is made with a variety of vegetables, such as tomatoes, beans, zucchini, and potatoes, cooked in a flavorful broth. What sets pistou soup apart is the addition of pistou, a sauce made with garlic, basil, olive oil, and Parmesan cheese. The sauce is stirred into the soup just before serving, adding a burst of fresh and aromatic flavors. Pistou soup is a comforting and nourishing dish that is perfect for cooler days in Cannes.