Slice all vegetables as directed above.
Take 1/2 of the shrimp and slice lengthwise.
Place four slice of bread on a larger serving plate.
Spread all of the chosen [salmon] spread all over the first bread slices.
Layer with thin slices of cucumber.
Slather some of the Smörgåstårta cream frosting on another 4 pieces of bread and place over the cucumber layer.
Spread some of the Smörgåstårta cream frosting all over the second layer of bread slices.
Break up about 1/2 of the smoked salmon and place on top of cream.
Spread some of the cream frosting all over the bottom of the third layer of bread slices, and place on top.
Spread some of the cream frosting all over the top of the third layer of bread slices.
Place the sliced shrimp on top of cream.
Top with the fourth layer of bread.
Take the rest of the Smörgåstårta cream and frost like a cake with a rubber spatula.
Warm and wet a butter-knife and smooth.
Decorate the cake artfully with remaining ingredients, making smoked salmon "roses," alternating with remaining cucumber, radishes and shrimp.
Finish with fresh ground pepper and Kalles caviar.