In a medium bowl, stir together cheeses, honey, and pepper. Spread a layer of cheese mixture onto each bread slice.
Using a Y-shaped peeler, peel pears. Using a sharp knife, cut pears in half lengthwise. Avoiding the core, cut halves into ¼-inch-thick slices. Arrange pear slices in a single layer on 4 bread slices. Top pear layer with prosciutto. Cover with remaining bread slices, spread side down.
Using a serrated bread knife in a gentle sawing motion, trim and discard crusts from sandwiches. Cut each sandwich into 3 (3×1-inch) rectangles. Serve immediately, or cover with damp paper towels, place in an airtight container, and refrigerate until serving time.
Garnish with mint, if desired.
Recipe by TeaTime Magazine at https://teatimemagazine.com/prosciutto-pear-tea-sandwiches/