Prepare the sauteed oil. Put 2 tbsp cooking oil in a wok. Heat it up. Put in garlic and leeks. Let it fry until fragrant. Take out the garlic and leeks. Take only the oil. Set aside.
Process the preserved sour vegetables using a food processor. Grind until it becomes tiny pieces.
Press the water out as much as possible.
Put the ground pork in a bowl. Put in all the seasonings: oyster sauce, soy sauce, salt, pepper, sugar, and sauteed oil.
Add the minced preserved vegetables.
Mix well with a spoon or a spatula or a fork until well combined.
Put the mixture in a bowl, try to flatten the middle part to form a bowl in the center. This is to let some broth gather in the center.
Steam with high heat for 15 to 20 minutes.
Ready to serve with hot, steamy rice.
Video
Notes
Try to squeeze out the water from the sour vegetables as much as you can.
Make sure you mix the whole ingredients well, you can use a fork or chopsticks and stir it many times until the sour vegetables are dispersed throughout the entire batter.
Divide into 4 equal sizes to get individual portion.