Cut each bread slice to the same width as the cucumber halves.
Cut cucumber halves into 5-inch lengths.
Using a mandoline, cut 24 paper-thin slices from cucumber lengths, and arrange on paper towels to absorb moisture.
Spread a thin layer of Pink Peppercorn Butter onto each bread slice. Place a cucumber slice on bread rectangle, rolling back top edge and looping cucumber slice. Fold a cucumber slice in half to make a loop, and place on top of first looped slice in a staggered fashion. Add 2 more slices in the same manner. With the last cucumber slice, finish off by rolling end forward and back and tucking under. Repeat for remaining bread rectangles and cucumber slices.
Garnish with a sprinkle of ground peppercorns, if desired.
Notes
Make-Ahead Tip: Canapés can be assembled an hour in advance, covered with damp paper towels, and refrigerated until serving time.
Recipe by TeaTime Magazine at https://teatimemagazine.com/ruffled-cucumber-canapes-recipe/