Into a large soup pot over medium-high heat, crumble the sausage and ground beef. Use a spatula to break up any large pieces.
Add the onion and cook for 6 minutes, stirring frequently until browned.
Add the garlic and continue cooking for an additional 1 minute.
Add the crushed tomatoes, beef-style broth, tomato sauce, and Italian seasoning.
Bring to a boil, then add the lasagna noodles. Reduce the heat to low. Cover and simmer for 20 minutes, until the noodles are softened.
Ladle into soup bowls. Top with mozzarella, parmesan, and parsley then serve.