KOTO stands for "know one, teach one"—the motto of this organization, which, like Hoa Sua, trains disadvantaged kids for a job in the hospitality trade. So you know if you eat here, not only will your meal be prepared with great care, but any profits go to a good cause. Go for the grilled chicken with lemongrass or try one of the many vegetarian options. It's right beside the Temple of Literature, so it makes a good place to rest your legs after a visit there, but it also sometimes gets busy with tour groups. To avoid them, head for the second floor and eat at low tables while sitting on floor cushions, or go up to the rooftop terrace on the fourth floor and enjoy views over the Temple of Literature.