A lardon is a piece of bacon taken from the purified fat of a pig. Unlike the slices of bacon ubiquitous in most of the English-speaking world, lardons are oblong cubes roughly 1 cm×1 cm×2 cm. This is the most common form of bacon sold in much of Europe, but is something of a gourmet ingredient in the United States.

Lardons are frequently used in French cuisine and are a staple ingredient in Quiche Lorraine among other dishes.

Pork | French cuisine