Bring Tuttorosso Peeled Plum Italian Style Tomatoes, sugar, butter, and onions to a boil in a large saucepan over medium high heat.

Reduce heat to medium low and cook, stirring occasionally and mashing any large pieces of tomatoes with the back of a wooden spoon. Cook for 45 minutes or until flavors are blended and sauce is slightly reduced.

Remove the onion quarters and season the sauce with salt and pepper before serving.