1. Heat wok then sear the pork.
2. When oil and juice comes out of the pork, add garlic and onions then cook for 2 minutes.
3. Pour-in the soy sauce, vinegar, and water. Bring to boil.
4. Sprinkle pepper and stir.
5. Cover and simmer for 15 minutes or until the pork is tender.
6. Add the string beans and cook for 3 to 5 minutes.