In a separate pan prepare the bean paste. Get 2 bean cans, open them, drain the beans under running water and put them in the pan. Cover them with water and cook them on low fire. With a wooden spoon crush them in the pan while they are cooking. Keep on crushing until they become a paste, and keep on cooking until the water disappears. Add salt, chili flakes and some of the fresh coriander (or parsley) to the bean paste and reserve.