Late Night Eats in Surabaya, Indonesia: Rawon Setan
Surabaya is one of the best food cities in Indonesia, if I do say so myself. One of their more popular joints is Rawon Setan, which was known for serving rawon late into the night. Or morning, technically.
Rawon is a beef soup made with these black nuts called keluak. Keluak is poisonous but you can remove the toxicity by fermenting them. That's the main ingredient but the soup also contains various other spices in beef stock. Here, the soup with generous cubes of beef is served with rice and beansprouts.