2, a big pig bone, cut with a machete, you can also ask the butcher to help cut when buying bones. Cut into small pieces, put them into a pot, add water and a little baking soda, stir them by hand and soak them for about ten minutes.
3. Cut the skin of yam, which contains plant alkali. Allergic friends had better wear gloves to prevent it from itching. Cut the skin of yam clean, soak it in water, cut it into hob pieces and put it in a basin, and soak it in water to prevent it from oxidation and blackening.
4, prepare some small ingredients, a small piece of ginger, cut into ginger slices, a white onion, cut into onion segments.
5. After all the ingredients are ready, blanch the ribs, add water to the pot, and add cold water to the bones, which makes it easier to separate the blood in the bones. Adding some salt can give bones a bottom taste.
6. Pour in 10g cooking wine, and take away the fishy smell of bones when heated by using the volatile characteristics of cooking wine. After the water is boiled, remove the floating foam along the edge of the pot, blanch for about 5 minutes, remove it and wash it again with clear water.
7. Heat the pot first, then pour in the vegetable oil. After the oil is hot, pour in the onion, stir-fry the ginger slices and add water.
8. The amount of clear water should not exceed the bone. After the water is boiled, pour in the bones, and cook with high fire until the soup boils, then skim the floating foam and turn to low heat for 20 minutes.
9.20 minutes later, fish out the bone, pour the bone into the soup pot, then pour the soup, remove the yam from the water and pour it together with the bone, and simmer for 20 minutes.
10 After another 20 minutes, open the lid, add 3 grams of salt, pour a little sesame oil and sprinkle with chopped green onion.