1. Peel the onion, wash and shred it, soak it in red wine oil vinegar juice, and set aside.
2. Boil a pot of boiling water, quickly rinse the frosted beef slices and put them into the plate for cooling.
3. Wash the coriander, wash and shred the red pepper, and set aside.
4. Take a plate, put in the onion shreds of practice 1, arrange the frosted beef slices of practice 2, and finally put in the coriander, chili shreds and sour beans of practice 3.