Clean and peel the cucumbers, cut them in half lengthwise and remove the seeds. Cut cucumbers into thin slices and mix with 1 teaspoon salt and a little pepper. Leave to stand for about 20 minutes. Drain cucumbers well and squeeze out a little.
Mix butter and honey. Coarsely grate the cheese. Remove the crusts from the bread slices and spread a thin layer of honey butter on them. Spread cucumber and cheese on 6 slices of bread. Place the remaining slices on top and press down lightly.
Cut sandwiches in half diagonally. Wash parsley and chop finely. Sprinkle over the sandwiches.