Little Gems with Green Goddess Dressing

The original green goddess dressing (created by the Palace Hotel in San Francisco in honour of George Arliss’s performance in the play of the same name in the early twenties) was a mayonnaise-heavy affair; I’ve lightened it slightly, chiefly by using crème fraîche in place of the mayo. But it’s much the same otherwise: thick with anchovy, chopped herbs, spring onions and sharp with tarragon vinegar. To the little gems, I’ve suggested adding some waxy, sliced potatoes (despite the mash that’