Step1:Materials prepare
Step2:Wash soybeans. Bubble them u
Step3:Wash the pig keel. Boil the water in the pot. Put in the pig keel. Cook for 3 minutes, remove and drain.
Step4:Put the keel of the blanched fruit in the pot. Pour in enough cold water. Boil it in high heat. Remove the froth
Step5:Add some cooking wine. Add scallions and ginger slice
Step6:Pour in the soaked soybeans and cook. Boil and pour in a tablespoon of vinega
Step7:Boil in high heat. Keep the high heat for ten minutes. Turn to low heat for one and a half hours
Step8:When it's time to open the lid, put in the yam that has been washed, peeled and cut into pieces. Boil for another half an hour or so. Season with salt 10 minutes before starting the pot
Cooking tips:1. In order to dissolve the phosphorus and calcium in the bone into the soup, you can boil it in water and add a proper amount of vinegar to promote the precipitation of phosphorus and calcium. 2. Don't put salt in stewed bone soup too early, because salt will make the water in the meat run out quickly, accelerate the coagulation of protein and affect the taste of the soup. Therefore, you should put salt 10 minutes before starting the pot. It can not only avoid the influence of salt too early on the taste of the soup, but also avoid the insipid and tasteless ingredients in the soup because it is put too late. There are skills in making delicious dishes.