Foie Gras Foie gras is a French delicacy that is made from the liver of a duck or goose that has been force-fed to fatten it up. The process of making foie gras is controversial, but it is considered a luxury food by many. The most expensive foie gras in the world is from France, and it can cost up to $1,000 per pound. Saffron Saffron is a spice that is derived from the crocus flower. It is the most expensive spice in the world, and it takes over 75,000 crocus flowers to produce just one poun...