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.