Eccomi! Ve la do io la vera ricetta degli spaghetti al sugo
OH MY GOD! I'm still smiling...really spechless

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I couldn't answer to everyone so I'll make "il punto della situazione"
First of all...
Italy could be compared to the States...nothing is the same state-to-state, so in each regions of Italy there will be a different way to do the "spaghetti al sugo"...
I should say in truth that they are tipically from southern Italy anyway, cause in northern people prefer kind of pasta as "tagliatelle" or "rigatoni"...
TOMATE SAUCE
This is very simple to do by yourself, although I know you prefer doing shortly to buy done
1. Peal tomatoes, and you can do it easier throwing them into boiling water so that the peal can get off...
2. Then cut them "a cubetti", it means cut tomateos and make it boil in salted water for at least 15 min.
3. Drop and liquidize them (you can use quitely a blender or a a standmixer) ---> DONE! The tomatoes sauce is done to be used in any receipes
If you prefer to buy it into the supermarket, then Del Monte is good, as well as Cirio or DeRica, Santarosa...
Here specially during September people often in their house do the tomato sauce to be saved in bottle to use it during the following seasons without buy it outside, but I don't absolutely pretend you to do it abroad, it's a ver tipically Italian tradition called "Conserva".
Most of what you have said is good! But let me tell you something that never should be done doing the Sauce:
- NEVER use garlic and onion together! Everything wuold be very hard to "metabolize" One OR the other...CHOICE by flavour you prefer...me garlic!

- NEVER use much than a spoon of oil per person!
- NEVER add meat (whatever you add!), and vegetables! Apart from carrots and lovage that are a must if you put onion, which together do what we call "battuto di verdure"
At the end
PHASES:
1 - SOFFRITTO: This is the starting of everything, if you wrong in this phase you will fail all!
Blend carrots, lovage and onion OR garlic, than everything in a large pan with oil and a bit of water... VERY LOW FIRE! This is the secret, the lowest your fire the better your "soffritto"
2 - The main ingredients: Meat, Vegetables (not together!), olives and gammon ("puttanesca", my favourite!)...as you want your sauce to become add your favourite flavours...If you don't want to add nothing is good the same...step ahead
3 - THE LAST: Tomate sauce! Here if you put only fresh tomatoes scrubbed with a bit of basil is the softest sauce ("basilico & pomodoro fresco")...otherwise keep everything a bitter warmer than soffrito and after maximum 12-13 min the sauce is ready!
IN THE MEANWHILE COOK THE SPAGHETTI!

)) I prefer PENNE, but even spaghetti would be good after a day at the office destktop!!
Ah, DeCecco get often overcooked, better AntonioAmato, Barilla, Voiello, Divella...but Barilla is the best seller here and there I think to
Bye, and if someone of you said "In bocca al lupo"... I answer "crepi!"

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Good BYE
Diomede
PS: Where you can have the best Italian cuisine better than here!?!?!? COME and try! "Due penne al pomodoro si fanno in quattro e quattro otto!"It would be more difficult to translate in English the incredible amount or receips the italian cuisine have got...but if are interesint in somthine tell me and I'll do it for you!