You might try checking with the Vegetarian Society of DC (VSDC) --
www.vsdc.org -- You might consider contacting them via e-mail (their
address is on the website).
We've done some web searches and located some vegetarian restaurants in
the Washington, D.C. area, but since most of them are Indian, we suspect
it will be difficult to find low-fat or no-fat fare. Do any of you who
live in the D.C. area or visit there often have favorite restaurants
that serve at least some fat-free vegetarian dishes?