crushed tomatoes tomato paste water (plus more to reduce) garlic, minced Olive oil Flat leaf parsley (optional) Pour a the olive oil into a large stock pot. Add garlic and onion to saute on a very low flame. Cook until it starts to brown. Add the crushed tomatoes, tomato paste, and water. Stir and add in chopped parsley. Simmer sauce on a very low flame for at least 2 hours. Reduce with 1 cup of water every hour. Stir frequently throughout. Let the sauce thicken. Enjoy!