The Simplest Tomato Sauce Ever (Marcella Hazan)

Step 1

Combine the tomatoes, their juices, the butter, and the onion halves in a medium saucepan.

Step 2

Add a pinch or two of salt. Place over medium heat and bring to a simmer. Cook, uncovered, at a very slow but steady simmer, adjusting the heat as necessary, for about 45 minutes, or until droplets of fat float free from the tomato.

Step 3

Stir occasionally, mashing any large pieces of tomato with the back of a wooden spoon. Taste and salt as needed.

Step 4

Discard the onion.