Squid should be cooked for the shortest possible time – overcooking makes it tough and inedible. It can usually be bought ready-prepared, but if you need to prepare it yourself, this is how you do it. Draw back the rim of the body pouch to locate the quill­shaped pen and pull it out. Separate the body from the tentacles by pulling gently apart just below the eyes – the inedible head and inksac will come away together. Slip a finger under the skin and peel it away gently.