Truffels are edible fungi, like mushrooms. Unlike mushrooms, they grow underground near tree roots. Some ideas how to prepare them ;
https://titaitalia.com/blogs/events/the-fresh-truffle-guide-how-to-use-fresh-truffles

I would use in a risotto with mushrooms. Although expensive risotto!

Oh dear, I read this and thought you were asking for truffle recipes, as in chocolate truffles! I think you may be meaning the truffles that pigs dig up from the ground tho. I’ve never had one

Farmers markets and speciality stores may have suggestions?

Maybe invest in a gourmet cookbook or do an online search for recipes using truffles.