Never got a chance to try this, but a friend of mine came up with it
and swore it worked like a charm. He had an offset smoker (cheap
walmart dealie) and on one side of it, he took out the firegrate, put
down a layer of "firebrick" as he called it, put down another layer on
top of that, using as many as it took to fit from back to front (I
believe he said five, three longways, and two sideways in front of
them.) This should leave a slight gap at the back where the bottom of
the brick touched but the top did not. He then built up 3 or 4 layers
of brick up the side (enough to go about 9 to 12 inches) then a grate
on top covered with bricks. He said he would build a fire inside on the
bricks, let it burn with the lid down for about 30 minutes, then sweep
the coals and ashes into the crack and lay down the dough or pizza to
be cooked. He said he would use another brick in the center with the
fire around it to hold a dutch oven for baking biscuits or baked beans,
anything that needed a pan.

Like I said, I never got to try this out, so don't know if it would
work. the basic idea seems sound, may just take a little fiddling to
work. If you try, let me know.

BTW, He came up with this in a 3 day snowstorm. Taught him to have
electric heat and an electric stove.

Jon

Go Falcons! 4-0