For which dish is Joel Robuchon most famous?

Joel Robuchon is most famous for his exceptional mashed potatoes, specifically his purée de pommes de terre. This dish is renowned for its silky texture and rich, buttery flavor, achieved through meticulous techniques that include using a high proportion of butter to potatoes and passing the mixture through a fine sieve to achieve a velvety smooth consistency. Robuchon's mashed potatoes have often been described as the 'best in the world,' and they showcase his philosophy of simplicity and the highlighting of quality ingredients.

In contrast to other dishes, such as beef bourguignon, crème brûlée, or coq au vin, which are iconic within French cuisine, Robuchon's signature mashed potatoes set him apart as a chef who elevated a simple staple to a level of culinary artistry. This dish has become synonymous with his name and exemplifies his innovative contributions to French cooking.