1. Wrap the tofu with kitchen paper towels and put it in the microwave for 1 to 2 minutes to drain the water. Let it cool to room temperature and mash it in a bowl. Set aside.
2. In a frying-pan, heat 1 tbsp oil and fry garlic and ginger until aromatic. Then add zha cai and stir-fry for a few more minutes. Add the ingredient A to season. Let it cool to room temperature.
3. In a bowl add ground beef, the drained tofu from #1, zha cai from #2 and the ingredient B. Mix until well combined and sticky.
4. Shape into patties. In a skillet, heat 1 or 2 tbsp vegetable oil over medium-high heat. Place the patties and reduce the heat to low. Fry them on both sides until nicely brown or until cooked through. Cover and cook for another 5 mins.