Marcella Hazan's 3 Ingredient Tomato Sauce

Step 2: Simmer the sauce

Sauce

  • Butter, unsalted
    70 g~5 tbsp
  • Salt
    to taste

Add the tomatoes, butter, peeled onion halves, and a small pinch of salt to a large skillet over medium-low heat.

  • A wider skillet sauce more effectively than a deep pot: the wider surface area evaporates moisture more easily.

Stirring occasionally, let the sauce until it is reduced and thickened, about 30 minutes.