Steps

Melt the butter in a small saucepan over low heat. Add leeks and cook gently, stirring often, until soft but not browned ~8 mins

Add diced potatoes and water. Bring to a boil, then reduce to a gentle simmer. Cook uncovered until the potatoes are tender and beginning to fall apart ~30 mins

Blend until perfectly smooth

Stir in cream and add salt and pepper to taste, and garnish with chives

cool to room temp and then refrigerate until well chilled

Garnish with chives