Set a small dark bowl of tapenade in the upper-centre of a long rectangular board.
Fan 14 salami slices in a wide arc to the left of the bowl, overlapping each slice by half and curving the row downward and outward to form the left bat wing. The wing should span about 20 cm.
Mirror the same arc on the right side with the remaining 14 slices to form the right wing.
Place two green olives just below the tapenade bowl, side by side, to form the bat eyes.
Arrange manchego cubes in clusters along the lower portion of the board, between and beneath the wings.
Fill the remaining spaces with water crackers and dark grape clusters.
Cover and refrigerate for up to 1 hour before serving.