Step 1

1 In a medium bowl, combine the cucumber, pepper and salt and marinate at room temperature, tossing occasionally, for 15 minutes

Step 2

2 Add the vinegar, toss to combine and let the mixture rest for 5 minutes

Step 3

3 While the cucumber is marinating, in a medium bowl, stir together the ricotta, chives, capers and lemon zest to combine

Step 4

4 Season to taste with with salt and pepper

Step 5

5 To assemble the sandwiches, spread the ricotta mixture equally one side of each slice of bread

Step 6

6 Top four of the slices with the salmon, then with cucumber slices

Step 7

7 Top with the remaining bread slices, cut the sandwiches in half and serve