Chill the melon thoroughly. Cut it into six slim wedges, scoop out the seeds and cut the skin away. Place one piece of melon on each slice of ham and wrap the ham neatly over the melon.

Pack each portion in cling film and place them in a rigid container or wrap in foil in a chiller box. Sprinkle the melon and ham with lemon juice and freshly ground black pepper just before serving. Serve the melon gondolas with the wedges of lemon.