1. Heat oil in a cooking pot.
2. Sauté garlic until it turns light brown.
3. Add pork and cook for 3 to 5 minutes.
4. Pour-in soy sauce, oyster sauce, and water. Let boil and simmer until pork becomes tender.
5. Add vinegar and wait until the liquid re-boils. Stir.
6. Put-in sugar and fried tofu. Cook for 3 minutes.
7. Add salt, and pepper. Stir.
8. Turn off heat. Transfer to a serving bowl.