Cut off the crust of the bread from the side that will be in the center of the cake, so the cakes will be thinner, neater and soaked better. Open the can of fish and drain the excess liquid.
Place the prepared bread in the shape of a circle on a flat plate. Mash the canned tuna with a fork and mix with a quarter of the cream cheese until smooth. Coat the first cake layer with the resulting mixture.
Place another layer of bread, finely chop the parsley, mix with the remaining cheese and brush the second layer with half the mixture. Cut off the uneven edges of the salmon, chop them into cubes and place the pieces on the cheese. Leave the thickest and fleshiest part to decorate the top layer.
Place the third layer, brush it with the remaining cheese, and decorate with beautiful pieces of salmon. Cut the cucumber into half rings, sweet pepper into strips, and cut off the top of the tomato and decorate the top of the cake with vegetables. The final touch is the olives, drain them and place on top. Let the holiday sandwich soak in the refrigerator for about an hour.
To serve, cut the dish into triangles like a cake, place on small plates and garnish with fresh herbs for extra flavor.