1. Ingredients: old tofu, pork ham (sliced), shredded mustard.
2. Chop the old tofu into pieces.
3. Pour the oil in the pot to heat, add the crushed old tofu and stir fry.
4. Next, stir in the cut pork ham and mustard strips and stir fry.
5. Then, add an appropriate amount of salt.
6. Add the right amount of MSG.
7. Stir-fry well and serve.