1 Combine cheese, cream and chives in a bowl. Season with salt and pepper. Mix well.
2 Cut both ends off cucumber and discard. Thinly slice cucumber into rounds.3 To assemble, spread one-third of the cheese mixture over one side of half the white bread. Top with cucumber, slightly overlapping the slices. Spread another one-third of the cheese mixture over one side of rye bread. Place bread on top of cucumber, cheese facing up.
Top with salmon, slightly overlapping the slices.
4 Spread remaining cheese mixture over one side of remaining white bread. Place bread on top of salmon, cheese facing down.
5 Using a large serrated or electric knife, cut all the crusts off sandwiches. Cut each sandwich into three fingers.6 Place on a serving plate. Garnish with watercress.