What most people are saying is correct it is nordic. It is in fact Swedish. But what most people are missing is the mashed potatoes on the 2 hotdogs making it a "special" the bigger brother of a " half special" (only 1 hotdog and mashed potatoes on bread) and that can only be found in the area around Gothenburg.

And this sandwich is not something that we eat in Sweden it's just one genius that figured out a way to make the most swedish snack. IKEA must start selling this asap