1. Wash and drain the lean meat, cut into thin slices, put in a bowl, mix in a little soy sauce and cornstarch, stir well and set aside.
2. Add oil to the pot, heat up on high heat, add the meat slices and stir fry.
3. Stir-fry until the color turns white, add mustard greens and stir well.
4. Add white sugar and stir-fry evenly to turn off the heat.
5. Take out the pan and serve.
6. Serve and enjoy.
7. Very good meal.
