Believed to have originated in the rural Lorraine Region of France, Quiche Lorraine consisted of an open pie, made using a bottom crust with a filling of custard and smoked bacon.
A cast iron skillet was used to cook the original quiche and cheese was added to the recipe at a much later time.
How to observe
Try making your own Quiche Lorraine and use the hastag #QuicheLorraineDay to post on social media.
History
Unfortunately the creator of National Quiche Lorraine Day cannot be found.