One of my pet peeves with Americanized dishes claiming to be Italian is the greasy, chunky “marinara” sauce that many restaurants offer as an alternative to the also inauthentic “alfredo” sauce with pasta or served as a dipping sauce with fried cheese sticks.  Heartburn on a plate, I call it.  I ordered that not long ago because it was the only thing a vegetarian like myself could eat on the menu.  I could barely get through it.  Big chunks of onions swimming in bright red grease that flung onto my shirt and drowned the overcooked spaghetti.  This is what we...