The tomatillo resembles a small green tomato and in Mexican cooking it is often referred to as such. However, the tomatillo grows encased in a paper-thin husk similar to a cape gooseberry. The fruit can be used raw or cooked and adds a distinctive flavour to Mexican and Spanish dishes. They grow well in warmer climes but tend to take over the garden. Those familiar with Mexican cooking probably already know or have heard of tomatillos. They are a staple in Mexican cooking and like tomatoes belong to the nightshade family.