1. Ingredients: 1 oxtail, 5 pieces of beef bone marrow, 2 iron yams, 1 king oyster mushroom, 1 box of crab-flavored mushrooms, appropriate amount of vermicelli, appropriate amount of chives, a little coriander, A few bay leaves, an appropriate amount of salt, and a little pepper.

2. Wash the ox tail and bone marrow.

3. Soak in clean water for 1 hour, remove and control the water, then put the oxtail, beef bone marrow, ginger and cooking wine into a pot of clean water and blanch them.

4. After boiling, continue to cook for two or three minutes.

5. Remove the oxtail and beef bone marrow, put them into the pot, add the green onion and ginger slices, add water, and simmer for 3 hours until the water covers the ingredients.

6. Process the ingredients and boil the vermicelli until cooked.

7. Cut the yam into diamond-shaped pieces, and slice the king oyster mushroom and carrot into slices.

8. After three hours, put the processed ingredients, yams and fungi into the bottom of the casserole.

9. Add beef bone soup and cook for about 15 minutes.

10. Take out an appropriate amount of oxtail and bone marrow from the electric cooker and add chopped green onion and blanched vermicelli.

11. Add appropriate amount of salt, add carrot slices and roll them a few times.

12. Turn off the heat and add appropriate amount of pepper.