Needing to shed a few pounds, my wife and I went on a diet that had specific recipes for each meal of the day. We followed the instructions closely, dividing the finished recipe in half for our individual plates. We felt terrific and thought the diet was wonderful -- we never even felt hungry!
But soon we realized we were gaining weight, not losing it. Checking the recipes again, we found it. There in the not-so-fine, fine print, was the answer: "Serving Size: 6."