Trotter and Yam Soup
                            
                                1.
                                Prepare the ingredients
                                    
                            
                            
                                2.
                                The pig's trotter is dipped into the water first
                                    
                            
                            
                                3.
                                Put it in a casserole, add a little lemon zest and add water
                                    
                            
                            
                                4.
                                Add the chopped yam to the casserole
                                    
                            
                            
                                5.
                                Simmer together for about 1 and a half hours
                                    
                            
                            
                                6.
                                Nutritious and delicious
                                    
                            
                            
                                Tips: 
                                The trotters are soaked in blood and put in a casserole stew to make it more delicious.