Bring a large pot of salted water to a boil. Add spaghetti and cook according to package instructions until al dente. Drain and set aside.

In a skillet over medium heat, add ground beef and cook until browned. Drain excess fat.

Add chopped onion and minced garlic to the skillet. Sauté until onion is translucent.

Stir in diced tomatoes, tomato paste, oregano, basil, salt, black pepper, and beef broth. Bring to a simmer.

Reduce heat and let the sauce simmer for about 15 minutes, stirring occasionally.

Add the cooked spaghetti to the meat sauce and toss to combine. Serve hot, garnished with grated parmesan and chopped parsley.