Slice the smoked salmon into neat pieces.
Cut the avocado in half, remove the pit, and scoop out the flesh.
Slice the avocado into thin, even slices.
Peel the cucumber and cut it into thin rounds.
Thinly slice the red onion for garnish.
Arrange the smoked salmon on a serving plate.
Layer the avocado slices next to the salmon.
Scatter cucumber rounds and red onion slices around the plate.
Drizzle olive oil and lemon juice over the entire dish.
Finish with a sprinkle of fresh dill and capers for added flavor.