In a large skillet combine ground beef, ground sausage, onion, bell pepper, and garlic. Cook over medium heat, stirring occasionally, until beef and sausage are cooked through and crumbled. Drain.
Transfer meat mixture to a large stew pot and add in broth, tomatoes, sauce, thyme, Italian seasoning, brown sugar, and salt.
Bring to a boil, stirring occasionally, over medium-high heat.
Reduce heat, and simmer about 20 minutes, stirring occasionally.
Add in noodles and continue simmering until noodles are tender.
Stir in the Parmesan cheese.
Serve soup and garnish each bowl with shredded mozzarella and a piece of warm, crusty bread.