It looks like a cake covered with disgusting savory toppings, but it's actually a tasty layered sandwich with smoked trout mousse, smoked salmon, cucumbers, mustard sauce and topped with a sour cream and cream cheese "frosting" and salmon, shrimp, eggs, radishes and parsley. Even if you aren't big on the fish filling, try your favorite sandwich fillings instead...just imagine a Reuben Smorgastarta. It might not be authentic, but man would it be satisfying.