How is the soup made in Lanzhou Lamian Noodles?

Ingredients: 2 pig leg bones, 5 slices of ginger, 2 tablespoons of salt.

1. First, blanch the pig leg bones for 3-5 minutes to remove the blood from the meat.

2. Then take out the scalded pig leg bone, rinse it with warm water for 2-3 times, and then rinse the blood foam and impurities again.

3. Fill the casserole with water again, add the pork leg bones, salt and ginger into the pot and bring to a boil.

4. Then cover and cook for 3-4 hours. If the soup in the middle evaporates a lot, you can add some boiling water.

5. At this time, filter the cooked broth with a strainer and store it in the refrigerator.