This is the type of pan I use for Ciabatta rolls. I let the dough proof in each pan, and then bake in the same pan. I bought mine at a Restaurant Supply House a few years back. Works great. The pan is a small steam pan you see in Buffets
I made these and they came out fine. I made them 4.2 oz. size. I did make some that were 5 oz. size but a bit big for burgers. Will post the photo of them next. The bigger size were just as tasty toasted with butter, or whatever we desired.