Q - What does a dog's toy and an artichoke have in common?
A - They both squeak. A fresh and well-hydrated artichoke will make a soft squeak when the leaves are pressed. If you don't hear a squeak, the artichoke is old, and no amount of butter or aioli will save it.

Chef Steve Rose and I prepare the grilled artichoke recipe from my first book SNACKS: Adventures in Food, Aisle by Aisle on his television show: