The night before the Lent fast started  a head monk of a monastery gave strict orders to his monks that no one should light a fire for forty days.  However, a young monk was unable to sustain the fast, and 20 days into the fast grew very hungry. 

The head monk sent this young monk to gather eggs from the monastery chicken. While the young monk collected the eggs he placed one egg in his pocket. The young monk happily ran back to his compartment, and started to think of a way to cook the egg in a manner that no smoke would be created, and result in him being  found out.  

The young monk saw a candle and quickly placed the egg on the handle of a large church key using it  to hold the egg in place while it cooked.  The head monk seeing that the door was closed realized something was wrong as the monks tended to leave their doors open.  He walked to the door and peered in, seeing what was happening the head monk immediately  opened the door and yelled "What are you doing?". The young monk quickly replied "It is not me, but rather this is the devil's trick."  The Devil then appeared and said  "No I did not do this .. as  I could  never have thought of it."

Origin: Cyprus