Zuppa di broccoli e patate is a traditional vegetable soup. The soup is usually made with a combination of broccoli, potatoes, onions, butter, garlic, meat or vegetable stock, olive oil, salt, pepper, basil, and Parmigiano-Reggiano cheese. The onions are cooked in olive oil and butter until soft and mixed with the sliced garlic, broccoli florets, and salt.
The mixture is cooked until tender, and the potatoes, stock, and water are then added to the pot. The soup is simmered until it becomes slightly thick and creamy. It’s seasoned with salt and pepper, and the basil is stirred in along with grated cheese and a knob of butter.