From the BBC:

A Belgian fast food firm says it will be offering customers in France a burger containing a slice of foie gras. The burgers, which will contain duck foie gras, as well as beef and lettuce, will be available for a short time in the days leading up to Christmas.

You'll recall that:

Foie gras is from the liver of a force-fed duck or goose, a practice that animal protection groups say is cruel.

Those French (and those Belgians)! They're animals!