"The Origins of the Pasty," an article by Nicole and Mark Reavis, gives the historic low-down on Butte's most famous (and probably most filling) dish.
Here's a snippet from the ode: "Visitors who come to Butte in search of a pasty need to be forewarned: They are gigantic and meant to fuel a working man’s body. We would encourage some form of physical exertion before attempting to consume one, as well as a place to nap afterwards."
Thelastbestplates.com purports to "explore the Big Sky one bite at a time." If pasties aren't your thing, there's plenty of other delicious-looking options highlighted on the website.