Below are links to vegetarian tamales:
http://www.recipezaar.com/r/q=tamales/169
http://www.epicurious.com/recipes/fi...exclude_other=
And this one is more of a traditional tamale made with texturized vegetable protein (fake ground beef):
http://www.recipesource.com/special-.../tamales2.html
You could really use any tamale recipe and replace the meat with the vegetable protein (found in your grocer's freezer). I use Morningstar Farms crumbles as a meat substitute - it's very good!