In a large pot, brown the ground beef over medium-high heat until no pink remains.
Add diced onion to the pot and sauté for 5 minutes until softened.
Stir in the minced garlic and cook for 60 seconds until fragrant.
Pour in the marinara sauce and beef broth, then stir in the dried oregano, basil, and red pepper flakes.
Bring the mixture to a rolling boil.
Add the broken lasagna noodles and reduce heat to a simmer.
Cook for 12 to 15 minutes until the pasta is tender.
Ladle the soup into bowls and garnish each with a tablespoon of ricotta and shredded mozzarella.