Are you a fan of Earl Grey Tea?  If so, below is the most important ingredient in the tea.  Earl Grey is a black tea flavored with bergamot oil.  The oil comes from the bergamot orange, which today grows mostly in southern Italy.  But, making a good Earl Grey requires a good black tea. If your tea company does not make a good black tea, their version of Earl Grey will be disappointing.  Here is the bergamot orange.

Thanks to Flickr user Xenocryst @ Antares Scorpii for the image.