Artist, glassblower and then some... Tanja Sæter cooks on freshly blown glass.

'First, a glass bowl or plate is hand-blown into the necessary shape, which depends on the kind of food to be cooked', explains the artist. 'Then, the food is placed onto the glass, which is still about 900 c hot, and instantly cooked.'
via king studios

(Again, thank you Elif)