How fun! You've inspired me to go to my local farmer's market and just buy fruit/veggies I would normally not buy.
Jicama is awesome - next to salads, it's really good in fruit-based salsas such as Mango salsa. It adds a nice crunchy texture. I imagine you can add it to any recipe that calls for a crunchy texture - it's so mild it will blend with many things.
Have a blast!