01 - In a small mixing bowl, blend softened cream cheese, unsalted butter, fresh dill if using, salt, and pepper until fully combined and smooth.
02 - Evenly spread the cream cheese mixture over each slice of white sandwich bread using a butter knife or offset spatula.
03 - Arrange the sliced cucumber in overlapping layers on half the bread slices.
04 - Place the remaining bread slices, cream cheese side down, over the cucumbers to complete the sandwiches.
05 - Gently press each sandwich and cut into quarters, forming rectangles or triangles. Serve immediately or keep covered with a damp paper towel in the refrigerator until serving.