You reeeeally downplay Smörgåstårta (pinnacle of any scandinavian festivity food imo) with this description. You have white bread with layered savory fillings - this is correct. But the contents should be like 40% shrimp, in what you call a Skagenröra or similar. And sallad leafs, cucumber slices, cold smoked salmon (very important), lemon slices and tomato. Lots of dill as well.

I promise it's the best.