Vichyssoise is a thick, creamy soup of leeks, potatoes, and onions, classically served chilled — though hot versions exist. The vegetables are sweated in butter, simmered in stock until tender, puréed silky smooth, and enriched with cream, then seasoned and chilled thoroughly. Its origins are disputed between French and American claims, but it became the defining elegant cold soup of twentieth-century fine dining. The chilling mutes flavours, so seasoning must be bold and checked cold. Served in chilled bowls or cups, often with a swirl of cream and chives, it is summer luxury in a bowl — and a demonstration that soup need not be hot to be comforting.