The starvation diet
Going way below the recommended adult intake of 2,000 calories per day like Dr Lulu Peters' 1920s diet did could actually work. She told her followers to have only 750.
While this is potentially very dangerous, you will lose weight. As long as you keep on top of your vitamins and minerals you might be alright, but with all the dangers and controversy surrounding anorexia its recommended that you give this dish a miss.