Finns like Voileipäkakku – a Sandwich Cake! It is served often on celebrational occasions like important birthdays and gymnasium graduation parties. These cakes are most often made with salmon or ham. Vegetarian options are becoming more popular too. Here is a tasty and filling version for vegetarians.
You need to make the filling and fill the cake hours before serving. You could make the cake the day before. It is best decorated just before serving. Typically it is decorated with what was used for the filling.