I used to make this in a restaurant where I worked. I have modified it for the home cook. You definitely need curing salt for this recipe. When you buy the pork butt, ask the butcher for the curing salt. Mine just gave me the salt I needed. I make this about twice a summer. It's the hit of any BBQ!!
An authentic recipe that takes 2 days. Have yours 2-way (served on a big plate of spaghetti); 3-way (add shredded Cheddar cheese); 4-way (add chopped raw onion on top of the cheese); or the big 5-way serving, everything plus a topping of kidney beans.