2. Put oil in the pan, stir-fry beef slices and shredded onion and ginger after 80% heat, then cover the cooked vermicelli with water, cover the lid and cook for about 10 minute, open the lid and add soaked and cut tremella, auricularia auricula, green pepper and onion. (You can add tomatoes if you like), then add salt, monosodium glutamate, sesame oil and coriander and cook for a while.