No broth? The trick is in the type of veggies, and how they are layered in the soup pot.
In a large soup pot, layer the vegetables in the order they are written in the directions. Pour the olive oil on top.
Cover pot and bring to a boil. Keep lid on, turn down to simmer, and cook for another 20 minutes.
Season to taste with salt and pepper.
Enjoy! If you tolerate cheese, you can add some freshly grated Parmesan. Make a meal by adding leftover chicken, or beans.