A guide through "Mary, egg and croissant"

Tara introduces an assignment exploring the role of food in art.  The image is titled "Mary, egg and croissant" and was photographed by William Klein.  The image is located at these urls:  http://www.pinterest.com/pin/30117891231012175/ and
https://www.rijksmuseum.nl/en/collection/RP-F-2005-107-360