Wash the meat and cut it into cubes. Add the spices, soy sauce, and oyster sauce and leave for 2 hours in the cold. Then fry the meat until tender.
1 small onion cut into half rings, add 1 tbsp vinegar, leave for half an hour. Then drain the liquid.
Cut the bell pepper into strips. Add beef, pickled onion, beans, garlic, chopped walnuts, herbs, mayonnaise, salt to taste.