Slice the cucumber into rounds about 1/2 inch thick and pat them dry with paper towels to remove excess moisture.
In a small bowl, mix together the softened cream cheese, lemon juice, chopped dill, and black pepper until smooth and well combined.
Spread or pipe about 1 teaspoon of the cream cheese mixture onto each cucumber round.
Top each cucumber bite with a piece of smoked salmon, folding it decoratively if desired.
Garnish with capers and a sprinkle of everything bagel seasoning if using, then serve immediately or refrigerate for up to 2 hours before serving.