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

Cook the beef: Heat olive oil in a large skillet over medium heat. Add the ground beef and cook, breaking it up with a spoon, until browned (about 5-7 minutes). Drain excess fat if needed.

Sauté aromatics: Add the diced onion to the skillet with the beef and cook until softened (about 3 minutes). Stir in the minced garlic and cook for another 30 seconds until fragrant.

Add tomatoes and seasonings: Pour in the crushed tomatoes, then add oregano, basil, red pepper flakes (if using), salt, and black pepper. Stir well to combine.

Simmer the sauce: Reduce heat to low and let the sauce simmer for about 10 minutes, stirring occasionally, until slightly thickened.

Combine pasta and sauce: Add the cooked pasta to the skillet with the sauce. Toss well to coat the pasta evenly. Cook for another 1-2 minutes to let the flavors meld.

Serve: Divide the pasta among plates or bowls. Top with grated Parmesan cheese and fresh basil if desired.