1In a large stock pot over medium heat, add butter and olive oil. Add chopped onion (I puree my sauce at the end so I don't worry about big chunks) cook and stir til translucent
2Add remaining ingredients (garlic, herbs and tomato)
Stir together and add 1 of the 28oz cans of water to the sauce.
3With a stick blender, blend to your desired consistency. My daughter hates chunks so mine is always well pureed. If you don't have a stick blender, you can alternately blend your sauce in a blender - carefully....
4Bring to bubbly, slightly cover pot and simmer for at least 30 minutes. I actually simmer most of the day . When I make meatballs (recipe coming), I simmer them in the sauce all day.