Some form of Western precedent for the mashed potato sub can be found in the Swedish fast food classic "tunnbrödsrulle". It's a flatbread wrap with mashed potat

Some form of Western precedent for the mashed potato sub can be found in the Swedish fast food classic "tunnbrödsrulle". It's a flatbread wrap with mashed potatoes and hot dogs served with condiments like shrimp salad, pickle relish, roasted onions and of course ketchup and mustard.