Boil the potatoes until tender, then peel and slice them.
This should ideally be done outdoors due to the strong smell.
Use a bucket of water to open the can underwater to minimize the odor.
Spread a thin layer of butter on each flatbread.
Place a few slices of boiled potatoes on each buttered flatbread.
Add pieces of surströmming on top of the potatoes.
Sprinkle finely chopped red onion and fresh dill over the surströmming.
Add a dollop of sour cream or crème fraîche on top.
Add chopped hard-boiled eggs to the sandwich for extra flavor and texture.
Fold the flatbread over the filling or roll it up to eat as a sandwich.
Enjoy your meal!