Jicama is a plant from Central America. I had it once in a restaurant- only the roots are eaten, and they taste a bit like apples... no idea where to get them, though.
It's available here (the southwest) at regular grocery stores. Elsewhere, I might try a Mexican food store. My favorite way to eat it is in fruit salads.
Thank you for your help. I live in U.K. and probably can't source jicama. :)
That's too bad. I like jicama. It's readily available in grocery stores here in Florida. It's versatile because you can use it in both fruit salad dishes and in regular salads. That's how I usually eat them.