Chef Scott McDonald poses with his creation, which it is claimed is the world's most expensive sandwich, at Selfridges department store in London, Monday April 10, 2006. Named the McDonald sandwich, after its creator, the ingredients are Wagyu beef, fresh lobe foie gras, black truffle mayonnaise, brie de meaux, rocket, red pepper and mustard confit, and English plum tomatoes, all packed into 24-hour fermented sour dough bread - and it sells for 85 pounds (US$ 148.33 / euro 122.53) each.