By all accounts Vegetarian House is a strange little restaurant. Located right inside the gates of Old Town/China Town (almost right next door to that seedy adult book store) Vegetarian House doesn't have the most wonderful location. (At night you're bound to be rubbing elbows with a few drug dealers and drunks, but it's an experience that's worth dealing with it.)
Vegetarian House is based on an interesting concept - take the menu of a traditional Chinese restaurant and replace all the meat with meat alternative (including various textured soy proteins and other tofu related foods). This means you can go in and order Cashew "Chicken" or Mushu "Pork" and what you'll get is a meatless rendition of the dish that looks alot like (but doesn't exactly taste like) it's meated counterpart. The interesting thing about Vegetarian House is that the dishes are more interesting and tasty in their own right vs. as a meatless rendition of their namesakes. The Kung Pow "Chicken" doesn't taste a thing like chicken, but it is sweet, spicy and very tasty. Potstickers look like traditional potstickers but taste quite different - and that's not a bad thing.
Vegetarian House is a culinary oddity that is worth checking out even if your not a vegetarian. There's absolutely nothing else like it in Portland, and after eating there you might find yourself craving some of their unique dishes and begin plotting your return.