Spaghetti sauce is a type of sauce typically served with spaghetti pasta. There are four common types of spaghetti sauce: Pesto (5 letters), Bolognese (9 letters), Carbonara (9 letters), and Ragu (4 letters). Pesto is a sauce made from basil, garlic, olive oil, pine nuts, and Parmesan cheese. Bolognese is a meat-based sauce made from ground beef, tomatoes, onions, and herbs. Carbonara is a creamy sauce made from eggs, Parmesan cheese, and bacon. Lastly, Ragu is a tomato-based sauce made from tomatoes, onions, garlic, and herbs.