My friend with very good taste, gave me a gift of a beautiful box of lovely Mooncakes, fresh from Singapore. They are traditionally eaten during the mid Autumn festival on 15th September, linked to the moon goddess of immortality. Typical cakes have a thick filling usually made from lotus seed paste.
Apparently, during the Ming revolution, the cakes were used to smuggle secret messages to overthrow that Mongolian rulers of China. Another method of hiding the message was to print it on the surface of the mooncakes as a puzzle. To read the message, each of the four mooncakes were cut into four parts. The 16 pieces of cake were then pieced together so that the secret messages could be read. Eating the cakes destroyed the messages!