[EvRev]

It is more steamed than baked. All of the moisture is intact which leads to a lot juicier piece of meat. I recommend the GoSun portable unit that is ~$100 to explore cooking with the sun.

Also it looks like they are searing the outside in a way by using the clear dishes over an opaque material that is directly absorbing the infrared heat.

[TheRealPomax]

At 700C during an Armenian summer, it is 100% properly baked, not just steamed. That's pizza oven territory ;)

[uoaei]

How about an old barrel and some tin foil?