The Campo family has made this "gravy", a meaty tomato sauce, for generations. Mr. Campo learned the recipe from his mother, Dominica "Minnie" Campo, who he suspects intentionally left out an ingredient. His never tasted as sublime as hers until he figured out the secret: lamb chops. The Campos enrich the gravy with a variety of meats: links of hot Italian sausage, slender baby back ribs, hearty pork neck bones, and thin-cut lamb shoulder chops. Before adding it to the sauce, be sure to roast all the meat until it's completely caramelized; the sauce will taste richer. If you'd like to cook meatballs with the gravy, add them at least 20 minutes but no longer than two hours in advance of serving.