1. Cut the tenderloin into strips and soak it in clean water for about an hour to remove the blood.

2. Take it out and control the dry water, put cold water into the pot and blanch the blood.

3. After blanching, wash out the floating foam with cold water, put it into the pot again, add some water, ginger slices and green onions, and bring it to a boil.

4. Simmer for an hour and a half on low heat, add a little salt and stew for a while when it is 80% ripe.

5. The kung fu of stewing beef, prepare all the ingredients, put them into a cooking machine and grind them into powder, not too fine, but with a little small particles.

6. Take the stewed beef out of the soup to control the water.

7. Put a little oil in the pot, add the beef strips, stir-fry with low heat until the beef jerky is a little brown, which takes about 10- 12 minutes.

8. Re-start the pot, heat it with a little oil, add rock sugar and stir-fry it with low heat, and add the fried beef and stir-fry.

9. Add the ingredients and stir well.

10. Add oyster sauce and continue to stir fry.

1 1. Add cooked sesame seeds and stir well before taking out the pan.