My local Mexican grocer had some xoconostle (sour prickly pears) and even though they were a little sad looking, I bought them all.
We have a new shipment in from Mexico that includes clay comales and I've been eager to grill something other than tortillas on them. The xoconostle proved tp be perfect. The fruit in the photo look a little over-charred but the burn didn't go any deeper than the skin and the juicy flesh was easy to scoop out.
If you want a clay comal, you'll need to come visit us at our store in Napa. They're sturdy and I've never broken one (knock wood!) but we don't have the facilities to ship them yet.