Heat the oil in a pan.
Saute the onion, tomato, and garlic.
Sprinkle a dash of ground black pepper.
Once the onion turns soft, put-in the shrimp and stir fry for 2 to 3 minutes.
Add the string beans and soy sauce. Continue to stir fry for 5 minutes.
Add salt and pepper to taste.
Serve. Share and enjoy!