Minnesota is spot on, the infamous Jucy Lucy.

For those unfamiliar, it's a burger where they put the cheese inside of it, and then grill it. There's lots of different styles of it, sometimes bacon crumbles goes in too, or jalepenos, whatever, you get the idea. Lots of places around here have them. There's even a few places, like my favorite, The Blue Door Pub, where they ONLY have Jucy Lucy's on the menu and have numerous ones to choose from. I do have to say that I am glad they didn't name a specific Jucy Lucy from a specific place, because that always starts a local "OMG THATS NOT THE BEST JUCY LUCY IN TOWN" conversation in local forums/subreddits.

I would also like to speak up for North Dakota and say I've never even heard of that sandwich or seen it on a menu, but perhaps it's because I'm not 90 years old. It should have been a Grinder from The Red Pepper, which is a place that has locations in Grand Forks and Fargo. ANY ONE who has lived in Grand Forks knows and loves the Grinder from The Red Pepper. The demand is so huge from ex-college students and residents, that they even started Fed-Exing Grinder "kits" anywhere in the nation and even overseas. Another co-worker of mine and I have ordered grinder kits from them before and made them at work for lunch. It's a simple sandwich with deli meat of your choosing, cheese, lettuce, and a big slab of their awesome taco meat across the top. It's a delicious.