First, put 1 tsp of oil and garlic powder on minced pork, stir them evenly.
Second, wash the outer layer of preserved mustard stem thoroughly. Cut them into small pieces and submerge them in water for about 30 minutes. After that, use a strainer to dry mustard.
Next, put the mustard stem in the wok without oil first so the water can evaporate. Then add ½ tsp oil and sugar until sugar is melted, put that on the dish.
Then, cut tofu into small pieces. Put 1 tbsp oil and fry tofu on high heat until they become golden. Pour the oyster sauce in and fry them evenly, Put them aside.
Press fish paste to flatten it out into the same thickness as the tofu. Fry both sides of the fish paste and cut it to the same size as the tofu.
Cut green onion into small pieces.
Lastly, place minced pork in the wok evenly. Pan fry with high heat for about 1 minute on both sides and stir them evenly. After frying the mustard stem evenly, add tofu and fish paste. Fry everything evenly and put in the green onions.