In your large pot, heat the olive oil over medium heat.

Add the ground beef and cook until browned, breaking it apart with a spoon as it cooks.

Once the beef is browned, add the chopped onion and minced garlic.

Sauté until the onion is translucent, about 3-4 minutes.

Stir in the crushed tomatoes and tomato paste.

Add the dried oregano, dried basil, salt, and pepper.

Bring the mixture to a simmer, then reduce the heat to low.

Let it simmer uncovered for about 20 minutes.

While the sauce is simmering, cook the spaghetti according to package instructions.

Once both the pasta and sauce are ready, drain the spaghetti and add it directly into the sauce.

Toss to coat the noodles evenly.

Serve hot, garnished with grated cheese if desired.