Using a sharp knife or a small coffin-shaped biscuit cutter, cut the bread slices into coffin shapes.
In a small bowl, mix the cream cheese with the lemon juice, chopped chives and lemon zest.
Spread the cream cheese mixture over the bread. Place one slice on top of another to make sandwiches, reserving some cream cheese to spread over the top slice.
Arrange a neatly folded piece of smoked salmon on each sandwich, trimming the edges to fit the coffin shape.
Cut the black olives into thin slivers and arrange them into a small cross on the upper part of the salmon. Place a caper near the bottom point of each coffin as a decorative detail.
Alternatively, use balsamic glaze to draw a cross or write “RIP” on the salmon.
Arrange on a serving platter and keep refrigerated until ready to serve.