P.F. Chang's has really great food to offer a vegan. If you've never been, definitely check it out. Try the tofu lettuce wraps, ma po tofu (my favorite!), the stir-fried Buddha's feast, the coconut curry vegetables, or the stir-fried spinach/asparagus/long beans with garlic. They even offer brown rice, if you prefer it, and have a nice selection of teas. The atmosphere is hard to beat, too, since most of my favorite vegan eateries are not especially pretty.
The food is served family-style - this is just what I chose to pile onto my plate. At the top is Ma Po tofu with steamed broccoli and scallions, one of my absolute favorite foods. I wish I knew how to cook it! If anyone has a recipe, please help me out. It's silken tofu fried in a smoky-tasting, super-spicy sauce. The broccoli was perfectly steamed - not too crisp, not too mushy. On the bottom left of my plate is some of my mom's coconut curry vegetables (there's tofu in there, too). It was broccoli, carrots, onions, sugar snap peas, red peppers, and crispy tofu in a really mild coconutty curryish sauce. Next to that is the Buddha's feast - you can get this steamed or stir-fried, but stir-fried is definitely the way to go, because you get this amazing sauce, which I have been assured is vegan - I usually ask every time I order this, just to be sure they haven't changed it. I have no idea what the sauce is, perhaps it's mushroom based, but it's just lovely. It's asparagus, sugar snap peas, carrots, broccoli, baby corn (I picked mine out, I don't like the stuff), shittake mushrooms (also picked out, I don't like a lot of mushrooms), and yummy tofu (again). When you visit this restaurant, a spicy sauce is made at your table using chili paste, hot mustard, chili oil, vinegar, and soy sauce. The sauce is great on the Buddha's feast. In the middle is some short-grain brown rice.
If you're with some non-vegan folks, this is a great place to go, because they can satisfy everyone's needs. The wait staff usually actually knows what "vegan" means, and if they don't, it's easy enough to explain and I have found that they are always very accomodating. It's not too expensive, either - a vegetarian entree, which is really large enough to feed two people (with unlimited rice), costs $6-$8. Appetizers are about the same price. Yum.