The Simpsons: 20 Awesome Easter Eggs And References
5. Vegetarian Recipe
Episode: Lisa the Vegetarian (S7, E5)
This Simpsons has played host to a wide range of famous British guest voices including grumpy talent show judge Simon Cowell, even grumpier chef Gordon Ramsey and former Prime Minister Tony Blair. In the episode Lisa The Vegetarian, The Beatles legend Paul McCartney lends his voice to the show.
In the episode Paul McCartney makes the strange statement that if you play the song Maybe Im Amazed backwards it reveals the recipe for a ripping lentil soup. The closing credits are accompanied by said song and sure enough, if you play it backwards, a voice can be heard faintly reciting the lentil soup recipe. Of course this version of the song was created especially for this particular episode by the Simpsons staff.
The full recipe can be found in rather more comprehensible terms on the extras section on disc 1 of the complete season 7 box set.
https://www.youtube.com/watch?v=QhYJ1s76ZLg