03Transfer duck to a plate. Pour off all but a couple of tablespoons of fat. Turn heat to medium high, and add onion; cook, stirring occasionally, until it softens, about 5 minutes. Add ginger, garlic and chilies and cook, stirring, for 30 seconds. Add beans and sugar and turn heat to high; cook, stirring occasionally, until beans begin to brown, about 5 minutes.04Add 2 tablespoons water and nam pla or soy sauce. Put duck on top of bean mixture and bring to a simmer. Cover and cook until both beans and duck are very tender, 15 to 30 more minutes, adding a little more water if necessary to keep mixture moist. (You can prepare dish in advance up to this point; cover and set aside until ready to eat, then reheat.) Uncover and stir in lime juice; taste and adjust seasoning, then sprinkle with cilantro and serve.