Holy Marmite Batman!
I can't really see the fuss over these as who's to say it's not Che Geuvara, Obi Wan Kenobi, Odin, Merlin, one of the beatles in 1969 etc. But they do seem to cause a lot of fuss.
One face of Jesus on a butty has recently been sold for a fortune - i'm off to check my Hovis.
Click on the holy toast image in the second link to find more images, including the sandwich which sold for 28,000$.