Preparation Heat 3 tablespoons olive oil in large pot over medium-high heat. Add onions and garlic and sauté until onions are golden, about 15 minutes. Add rosemary and stir 1 minute. Add all broth and beans. Bring soup to boil; reduce to medium-low and simmer until flavors blend, about 10 minutes. Working in batches, transfer soup to blender and puree until smooth; return to pot. Mix in spinach and sage; stir until spinach wilts, about 1 minute. Season soup to taste with salt and pepper. Ladle soup into bowls. Sprinkle each with Parmesan cheese and drizzle with extra-virgin olive oil, if desired.
Preparation Heat 3 tablespoons olive oil in large pot over medium-high heat. Add onions and garlic and sauté until onions are golden, about 15 minutes. Add rosemary and stir 1 minute. Add all broth and beans. Bring soup to boil; reduce to medium-low and simmer until flavors blend, about 10 minutes. Working in batches, transfer soup to blender and puree until smooth; return to pot. Mix in spinach and sage; stir until spinach wilts, about 1 minute. Season soup to taste with salt and pepper. Ladle soup into bowls. Sprinkle each with Parmesan cheese and drizzle with extra-virgin olive oil, if desired.