Chef Liu's, a strip-mall joint deep in Aurora, has a "secret" menu, and it features specialties from all over China, including Beijing-style pork with bean paste, fried pork livers and dan dan noodles. But Chef Liu's true specialties are the Szechuan dishes. Our favorites include mouth-numbing beef, twice-cooked pork, cumin-rubbed lamb and real Szechuan chicken. The best way to approach dinner here, though, might be to have your server order you a feast of interesting items, because that way you're sure to score something delicious you would otherwise have missed.