Boil a large pot of salted water and cook spaghetti until al dente, then drain and set aside

Heat a skillet over medium heat, add ground beef, and cook until browned

Add chopped onion and garlic, sauté until soft and fragrant

Stir in tomato paste, marinara sauce, beef broth, oregano, sugar, salt, and pepper

Let the sauce simmer for 10–15 minutes until thick and rich

Toss cooked spaghetti into the sauce and mix until fully coated

Slice the tops off bread rolls and hollow out the centers, leaving a thick wall

In a bowl, mix melted butter, garlic, parsley, Parmesan, and salt

Brush garlic butter generously inside and outside each bread bowl

Place bread bowls on a lined baking tray

Add a small layer of mozzarella cheese at the bottom of each bowl

Fill each bowl with spaghetti mixture

Top with more mozzarella and a sprinkle of Parmesan

Bake at 375°F (190°C) for 10–12 minutes until cheese melts and bread is crispy

Garnish with fresh parsley and serve warm