Tiengarden's Chinese is not only vegan but free of what the menu vilifies as "the five impurities"���onion, garlic, leeks, shallots and tobacco. While it's doubtful you'll miss tobacco in your mixed greens, the lack of onion and garlic is a little worrying. Happily, the kitchen manages to create a number of winning flavor combinations out of crisply fresh, lightly cooked vegetables. Tofu,...