Start by placing the tomatoes in a pan and breaking them apart by squeezing them.
Cut the onion in half, peel it, and add the halves to the sauce.
Incorporate five tablespoons of butter into the pan and set the stove to medium heat.
Allow the sauce to simmer for 45 minutes.
Once the sauce is ready, remove the onion halves.
Add the pasta to the sauce, ensuring it is well coated.
Season with additional salt and pepper to taste.
Serve the sauce topped with some parmesan.
