Pancetta, Onion, and Parsley Pasta Sauce

Pancetta is what Italians do with bacon. It is not smoked but cured with salt, black pepper, and such spices as nutmeg, cinnamon, cloves, or juniper berries, varying in proportion and assortment according to individual formulas. In the most common version of pancetta, the one usually available abroad, the meat is tightly rolled up after 2 weeks of gradual seasoning. It used to be pressed between boards and sold thus, but that is done now solely for show, and as a pretext to charge a higher