According to Sade: brick mush is FRIED

I've thought for a long while now that the food known as "brick mush" was nothing more than fried polenta.

While trying to fix (unsuccessfully) perhaps the most-damaged episode there is (42-03-04 Room Warming) I realized that this episode gives us a lot of information about brick mush.

It's very hard to make out because of the horrible sound but at about three minutes into the actual episode, the family discusses brick mush, which they say is "never raw."  Sade says something to the effect of, "The way I fix it, it's always fried" and then she goes on to talk about Uncle Fletcher's room, where he has no way to fry brick mush.

For reference, see this video.