Cost per Serving:
No more than 1 hour before serving, cut 32 crosswise slices of cucumber; arrange on a serving plate.
Mix cheese and sour cream in a bowl until smooth; spoon into a pastry bag fitted with a large star tip and pipe onto cucumber slices.
Cut salmon into 32 pieces; shape each into a roll and place on cheese mixture. Garnish with dill, if desired, and serve.