Fry patties in lots of olive oil, in a medium hot iron skillet, uncovered. Sprinkle with Old Bay seasoning, or other spice that goes with something a little sweet. TAKE CARE, the natural sugar in the yam tends to make the patties go from brown to burnt very quickly!
The Wave permit area on Bureau of Land Management Coyote Buttes wilderness area in Northern Arizona. I would like to have had a person in the photo for scale, but the sides were way too steep, including the place where I was standing.