Great value, great food.
Yau's was formerly Wong Gei on campus. They moved into a nicer, cleaner space just south of campus. It's very low-key and the food is always great and very inexpensive. I recommend asking what Chinese greens (such as kang kung or choi sum) are available and also inquire about the specials on the dry-erase board. They are always friendly and willing to help with good recommendations.