In a large pot, heat EVOO over medium-high heat. Add pancetta and cook, stirring occasionally, until browned and the fat is rendered, 3-4 minutes. Add the sirloin and pork to the pot and brown 12-15 minutes. Add the onion, carrots, celery, garlic and cook, stirring, until softened, 8-10 minutes more.
Add salt, pepper, nutmeg, bay leaves, thyme, marjoram or oregano, stir in the tomato paste for a minute or so then add wine and scrape up all the drippings. Reduce wine by half, 2-3 minutes then stir in stock and bring to a boil. Reduce the heat to simmer and thicken sauce 1 hour to 1 1/2 hours, stirring occasionally to keep the sauce from sticking to the bottom of the pan. Add milk or cream and simmer while water comes to boil and the pasta cooks.