Black Box is a very casual, pay at the counter, brunch option located in the Mahatun Plaza shopping center right next to Ploenchit. They have a lot of standard Western brunch dishes (eggs, salads, burgers) as well as a Thai menu. Although, the crowd on this Sunday morning was extremely Western favoring. I got the Espresso Tuna which was served with tomato salsa, avocado, a soft boiled egg, and a small side salad. It was fresh and light, nothing outstanding, but a a nice brunch. The location, variety, and casualness make this a solid go-to for a variety of occasions, but is nothing super special worth a special occasion brunchtime visit.