New York Style Pizza Sauce

Directions

1. Combine all ingredients except the onion and butter in a medium-sized mixing bowl. Blend with an immersion blender until smooth.

2. Pour the tomato purée into a medium saucepot. Add the onion to the sauce and cook on low for 1 hour, stirring occasionally.

3. After 1 hour, use tongs to remove the onion from the sauce and discard. Add the butter and stir until completely melted.