I can always count on Pho Saigon for fast delicious vietnamese food. They have a reasonable vegetarian menu and all of it tastes great (TIP: Make sure to ask for vegetable broth! Most of the broth is chicken).
Four stars only because they take a while to give you your bill and you have to plan your trip to the restaurant based on how busy you think the parking lot may be. Weekends are busy in the plaza because of the flea market.