Artichokes with Yellow Mystery Sauce

Artichokes always seem rather a treat – especially if they are prepared as cups in this way with the hairy choke and small leaves removed. In this simple recipe, they are eaten cold as a first course and can be prepared several hours in advance. See if anyone can guess what the subtle sauce is made of. If you drink water while eating artichokes, even tap water will taste as if it comes from a mountain spring.