  | 
                          1 duck, approximately 6 ˝ lb (3 k) cleaned, rinsed and cut in pieces | 
                        
                      
                      
                      
                        
                            | 
                          2 cups beer (chicha de jora is the correct ingredient  but beer can be used instead) | 
                        
                      
                      
                      
                        
                            | 
                          1 medium size onion, finely chopped | 
                        
                      
                      
                      
                        
                            | 
                          Stock or water, necessary amount | 
                        
                      
                      
                      
                      
                      
                        
                            | 
                          ˝ cup ground roasted peanuts | 
                        
                      
                      
                      
                        
                            | 
                          6 yellow potatoes (white potatoes may be used instead), peeled |