Ingredients:

• 1 28oz. can San Marzano tomatoes
• 5 TB butter
• 1 sweet yellow onion, peeled and halved

Directions:

• Add can of tomatoes, butter and onion to a large pot. Heat on medium until the sauce begins to simmer then lower the heat and simmer for 45 minutes. Stir occasionally, mashing the tomatoes with a wooden spoon. Remove from heat, discard onion and salt to taste.

• If you want to add ground meat (I like to add Italian sausage), brown in the pot first, drain and set aside. I then like to rub the flat side of the onion over the brown bits to add some flavor. Add the meat back in when the sauce is finished cooking.

via Smitten Kitchen