These are the three ingedients you'll need, but the essential one is San Marzano, if you can find them...
Photo from Smitten Kitchen
Now, I used San Marzano, chunks of tomatoes, because that's what my local store, Seven Brothers Gourmet, had on the shelf. A 28 ounce can is all you'll need, but you'll be running back for more so I recommend buying a few. An onion and butter ( I use Land-o-Lakes) are the other two ingredients, and I made it over spaghetti the first time and fusilli the second.
The thing of course that makes this so special and so delicious is the butter... you say, "butter, not olive oil", WOW, that's sounds crazy, but it's fabulously rich, and full bodied (whoops, that's a wine description, but it's true).
Thank you Deb from 'Smitten Kitchen', I read you all the time!