1. Materials. Appropriate amount of beef, 1 bell pepper, appropriate amount of salad oil, 4 grams of salt, appropriate amount of soy sauce, 5 grams of onion, 5 grams of ginger and a little oyster sauce.

1. After cutting beef into thin strips, add soy sauce and marinate for 5 minutes, then add cooking oil and marinate for 1 minutes.

2. When the oil is hot, bring the onion and ginger to the wok, turn on the fire, pour in the beef, and stir-fry quickly until the beef is slightly discolored.

3. Then quickly add green pepper, oyster sauce and salt, stir-fry and mix well before turning off the heat.