This sounds a lot like a pasty, a UP* culinary specialty that is enjoyed by trolls** and marketed to fudggies.***
Pasties were originally introduced in the UP by Cornish immigrants who worked the copper mines in the 1840s. Miners could carry a pastry under their helmets and have a hearty lunch without having to come out of the mine. The best pasties I've had were made by the Newberry UMC church ladies (located in the middle of the UP).
The traditional pasty is made with hamburger, potatoes, and rutabaga. However, you can get them with all kinds of different fillings. A pasty purest might let you get away with putting gravy on it and would probably just look away while sarcastically muttering a few things under their breath if you put sour cream on it. However, under no circumstances should ketchup ever be applied to a pasty, that is sacrilege!
* UP - Refers to Michigan's Upper Peninsula.
** Trolls - Refers to people in lower Northern Michigan who live under the Mackinaw Bridge.
*** Fudggies - Refers to people in Southern Michigan who come north on vacation and buy fudge from any of several specialty fudge shops found in Northern Michigan.
I think the first fudge shops were on Mackinaw Island and then branched out across the NW corner of the state. As a kid I can remember waiting all year to go to Lake Charlevoix and going to visit Murdick's Fudge (the best of all the fudge shops). My brother, sister, and I would each get our own one pound slab of fudge cut into small squares and placed in our own little white box with blue lettering. I would stretch out my stash of fudge as long as possible, but would also have to keep it hidden from my siblings who would eat theirs right away. It wasn't until years later when I moved north that I actually heard of a Fudggie. It is actually a very common slang term and many visitors have come to to embrace it!