Peel the cucumber with little strips of green remaining (think striped pants).
Cut the cucumber into ⅛” slices.
Lay the cucumber slices on a paper towel.
Sprinkle coarse sea salt over them.
Leve them to drain for 30 minutes.
Prepare your spread using the remaining ingredients.
Spread an even coating on one side of ½ the bread.
Lay cucumber slices evenly on top.
Put the next piece of bread on top.
Carefully cut away the bread crust.
Slice each sandwich into four quarters (or slices)
Place decoratively on a plate for serving fresh.