You can substitute "PS Olive Vegetables HK" with "Tian jian preserved vegetable". If you don't have any of this, then simply add some of salt to taste!
1. In a large pot of salted boiling water, cook the beans until just tender, about 2 minutes. Drain and rinse under cold water. Set aside.
2. In a wok or frying pan, heat 2 tbsp oil and fry garlic, ginger and zha cai. Cook until fragrant. Add leek, PS olive vegetables HK and ground pork, continue to stir-fry until the leek and pork are almost cooked.
3. Add dried chili and the ingredient "A" to season, cook for about 1 min. Then add green beans, stir for another minute.