1, truffle. Truffles have a unique smell, so far they can't be planted artificially, and they can only be dug by sows and dogs with strange taste.

2.caviar. Caviar is a sauce made from fish eggs Strictly speaking, only sturgeon eggs can be called caviar, and caviar produced in the Caspian Sea bordering Iran and Russia has the best quality.

3, foie gras. Foie gras is a traditional French dish, which is called the three major French delicacies together with truffles and caviar. The raw material is stuffed duck or goose liver. When feeding, the hose is directly inserted into the stomach through the esophagus of the animal, and feed such as corn is injected into the animal, so that the duck or foie gras produced is fat enough.