This is a great article posted on another site (who reposted it from another site, who took it from another), but I thought many would enjoy it here. It is The Lazy Man’s Guide for Constructing a Call of the Cthulhu Adventure, written by Sandy Petersen, original author of the Call of Cthulhu.
The old hermit living outside the village is rumoured to have a small rusty tin spoon that seems disturbingly ordinary but in reality is a magic spoon. If someone puts the spoon in their mouth will taste food. It can be any type of food, grilled meats, cheese, strawberry, bread and so on. The real bonus is that the food is real and with enough tastings can fill a hungry belly.