Saigon Blvd’s vibrant decor features digital art. Courtesy Saigon Blvd. There’s a pretty good reason Saigon Blvd, a new Vietnamese restaurant in Cupertino, hasn’t had an official grand opening event.

Even if I didn’t know that KoJa Kitchen started in 2011 as a food truck in San Francisco, it would’ve been obvious the minute I saw the menu. Here lies all the hallmarks of food-truck cuisine: fries ...