Which ingredient is commonly associated with Vichyssoise?

Vichyssoise is a classic French soup traditionally made from pureed leeks, potatoes, and cream, and it is typically served cold. Each of the ingredients plays a crucial role in defining the dish's flavor and texture.

Leeks are a primary component as they provide a mild, onion-like flavor foundational to Vichyssoise. They are often sautéed to soften them and bring out their sweetness before being blended with the other ingredients.

Potatoes contribute to the creamy texture of the soup. When blended, they help create a smooth consistency that is essential for this dish, as it is meant to be velvety and rich.

Cream is another key ingredient that gives Vichyssoise its luxurious mouthfeel and adds richness to the taste. It balances the flavors of the leeks and potatoes while also playing a significant role in the soup's classic creaminess.

Since Vichyssoise incorporates leeks, potatoes, and cream, the option that includes all of these ingredients captures the essence of the dish accurately. Therefore, the answer encompassing all of the ingredients makes sense as Vichyssoise cannot be fully represented by any single component alone.