Heat oil on a wok.
Add garlic, onion and tomato. Saute until onions are translucent.
Add ground ground and cook until color turns light brown.
Add shrimps and bok choy. Saute for 5 minutes.
Add chicken broth and boil.
Cover and simmer for 3 minutes.
Add fish sauce & black pepper.
Mix then transfer to a serving plate. Enjoy!