In a large pot, heat 3 tablespoons of cooking oil over medium heat until shimmering.

Add chopped garlic and sauté until it starts to brown, about 1 minute.

Introduce the sliced onion and crushed ginger, stirring until the onion softens and becomes translucent, approximately 2-3 minutes.

Add the chicken pieces and sear each side for about 1 minute until lightly browned.

Stir in half of the sliced tomatoes and cook for an additional 2 minutes.

Pour in 2 cups of water or chicken broth, increase the heat to a rolling boil.

Drop in the Knorr Chicken Cube and 2 tablespoons of fish sauce, reduce heat to low, and cover, simmering for 20 minutes.

Add the remaining sliced tomatoes, long green chili peppers, and bok choy, cover, and cook for another 3 minutes.

Season to taste with ground black pepper and additional fish sauce if desired before serving.