Preparation:

1. To make the side dish, heat a frying pan with olive oil and brown the halved pak choi. Season with salt and pepper and set aside.

2. To prepare the sauce, put another pan on the heat with the sesame oil, when it is very hot, brown the beef strips. Add the red onion and the leek cut into half-moons. Then add the peppers cut into thin strips and the grated carrot.

3. Drizzle the vegetables with the teriyaki sauce and salted, until the sauce is thinned. Season to taste.

4. Use the ingredients used in the recipe to create the ideal dish.