Wash, peel, and prepare all vegetables, and place in a large nonstick pot.
Pour in just enough water to cover all the veggies, and set pot to high heat.
Add in the vegetable bouillon cubes and salt, and bring everything to a boil.
Once soup comes to a boil, put a lid on it and lower to a simmer. Allow the soup to simmer for at least 1 hour, until veggies are tender and easily pierced with a fork.
Serve with a drizzle of olive oil, fresh Parmesan, and a sprinkle of freshly ground black pepper.