Polenta, corn tortillas and cornbread are acceptable browns, although they don't work for some people. I have also used blue corn tortilla chips in a pinch - the Garden of Eatin ones that are denser and not as oily and salty.
Allison

: Those are great ideas from Allison --
: polenta also popped into my head
: as a possible brown for your main,
: if they have it ... actually, as I
: type that, I'm realizing that I
: don't know if it *is* an
: acceptable brown?