Step 1

Cut the flank steak across the grain into thin slices.

Step 2

Season the beef with salt, black pepper, and some oil.

Step 3

Set it aside and let it marinate for 15 minutes.

Step 4

Cut the king oyster mushrooms and button mushrooms into slices.

Step 5

Rehydrate the dry shiitake mushrooms, then cut them into slices.

Step 6

Remove the string of the snow peas.

Step 7

Cut the bell pepper, both red and green, into strips.

Step 8

Combine all the ingredients B in a small bowl.

Step 9

Pan-fry the beef slices with oil on both sides over medium heat until golden brown. Remove and set aside.

Step 10

Saute the coarsely chopped garlic until aromatic with some oil.

Step 11

Add the mushrooms and stir-fry over medium heat until tender, which takes about 2 minutes.

Step 12

Include the snow peas and the bell pepper, and continue to stir-fry for another minute.

Step 13

Mix the stir-fry sauce with the mushrooms and vegetables.

Step 14

Return the cooked beef to the wok. Stir-fry the beef over medium-high heat for about a minute.

Step 15

Thicken the gravy with cornstarch slurry.

Step 16

Drizzle the Shaoxing wine and sesame oil on the beef and mix well. Dish out and serve.