Much of the South and West side of the Lake Superior Region has a history with porketta. Porketta is distributed throughout Northeastern Minnesota and the Upper Peninsula of Michigan.
It typically hails from iron mining towns where Italian immigrants moved to near the end of the 19th and early 20th centuries.
My family usually bought porketta roasts from Fred's Grocery in Nashwauk, Minn. A few places in Hibbing usually sell it too.
In the last decade stores in Duluth have begun to stock and sell it. The Italian Village in Duluth sells porketta sandwiches. The Pickwick of Duluth also sells a porketta sandwich.
Porketta is often served in one of two forms. The first is pulled porketta and the second is sliced porketta. Pulled porketta is just as it sounds. It is cooked whole and then shredded by hand afterwards. This is my favorite kind! Sliced porketta is either slin sliced like deli meat or sliced into quarter inch wide pieces.
I have observed an interesting correlation between areas that sell both porketta and pastys. It seems Italian miners brought their porketta with them and English Cornish miners brought their pastys with them. They usually worked in the same area, the Cornish men sinking nmine shafts and the Italian men laboring in the mines and local businesses.
Porketta is also spelled Porchetta. Since coming to America it has lost some of its preparation steps that it had in Italy.