1. In a large cooking pot, heat 1 tbsp vegetable oil and fry garlic and ginger over medium heat until fragrant. Add onion and ginger powder. Stir-fry, stirring often. Reduce the heat to medium-low and cook until the onions are golden brown.
2. Add chicken and cook for about 5 to 6 minutes, stirring occasionally. Add ingredients A and cook for another 2 mins.
3. Add ingredients B and bring it to boil. Reduce the heat and simmer for about 40 min.
4. Add ingredients C to season and simmer for another minute.