Go to the main menu and then to the "Special Features". Select the "Cauldron" in the center of the screen and you will see a screen with a number of herbs to brew your own love potion. Select Rosemary, Mint, Grapes and then Lavender in exactly this order and then go to "Mix". You will now be treated to "Making Magic" and "Casting The Spell", two documentaries on the movie.
All easter eggs were generously submitted by SirDonk