I will start by sharing with you a few very pretty examples of potentially sketchy advertising. In the 90s, there was a series of ads for a pasta sauce called Classico. It showed beautiful, sunlight-filled scenes from the Italian countryside, and the sauces were claimed to be examples of regional Italian variants of pasta sauce. See here, here, and here.
Back in the day, I saw the first one of the commercials linked. It left me with the impression that all over Italy, there were specific traditional regional variations on the basic red spaghetti sauce - and that buying this product would bring that wonderful variety to your table. However, since then, I have realized that there don’t seem to be any “Di Parma” or “Di Salerno” regional pasta sauces (in fact, that classic tomato-based sauce seems to be more of a Southern Italian thing, correct me if I’m wrong.) At any rate, I haven’t found many examples of regional variations on basic tomato sauce. Here is a list of supposedly regional sauces, and many are not based on tomato. Moreover, if you look at the second commercial I linked above, they include “customer testimonials” which I find difficult to believe (three people claiming that a sauce in a jar from the supermarket is as good as or better than their Italian mother’s homemade sauce). And the third commercial claims that the sauce featured therein is inspired by Italian cuisine, while repeating the company line at the end to the effect that what they sell is authentic Italian recipes.
OK, so what are some examples of authentic, traditional Italian pasta sauces besides the basic tomato sauce (that’s called Marinara, right? Tomato, onion, herbs, optional garlic)? The origins of some sauces are modern: Arrabiata - about the same but with garlic and chilli pepper-, which is an invention of modern Roman cuisine from the 50s/60s, according to Wikipedia, and Alfredo sauce an early 20th-century recipe from Alfredo Di Lelio, a Roman restaurateur. Or there’s the dish Penne alla vodka, with a rose sauce including vodka, which seems to be a recent invention. A Penne dish with vodka is first mentioned in a 1974 cookbook published by the actor Ugo Tognazzi.
So what about, for example, Amatriciana sauce (mainly tomato sauce, Pecorino cheese, and bits of cured hog jowl)? Is that “traditional”? Or what about “Fra Diavolo” (not so different from Arrabiata - made of tomato sauce, sauteed onions, crushed red pepper, and garlic). Is that a venerable old recipe?
What other regional variations that are old and authentic, and not known to come from modern chefs are there for pasta sauce? Do any of them concern variations on basic tomato-based sauce, like the apparently region-inspired ones in the advertisements for the Classico line of sauces shown above? Also, do people cooking spaghetti in Italy at home tend to be conservative, or do they ever experiment, producing results akin to the commercially available sauce I have shown here? Is it common for one person’s Nonna to like adding mushrooms to Marinara sauce, for another to favor adding grated cheese, another capers and olives, another roasted bell pepper, and so on, or do Italians generally keep it simple when making pasta at home?