Mimolette Cheese

From Wikipedia:

Mimolette is a cheese traditionally produced around the city of Lille in northern France (where it is also known as Boule de Lille), and also in some areas of Belgium and the Netherlands (where it is also known as vieux Hollande).

A cow's-milk cheese, it normally weighs about 2 kg (approximately 4.5 pounds). Its name comes from "mollet". When young its crust is supple, but with age it becomes harder. It has a grey crust and orangish flesh. The orange color comes from the natural colorant Achiote.

The greyish crust of aged Mimolette is the result of cheese mites intentionally introduced to add flavor by their action on the surface of the cheese.

Mimolette can be consumed at different stages of ageing. Most cheese-lovers appreciate it most when "extra-old" (extra-vieille). At that point, it can become rather hard to chew, and the flesh takes a delicious hazelnut-like flavour.