In a wok, put 4 tbsp oil over medium heat, add tofu and cook for about 7-8 minutes. Set aside.
In the same wok, add 1 tbsp oil over high heat.
Add garlic and chilies. Saute until fragrant.
Add oyster sauce, soy sauce, cornstarch mixture and brown sugar. Stir well.
Add kangkong stalks and cook for 2 minutes. Then add kangkong leaves and cook for another minute.
Add fried tofu and combine with the rest of ingredients. Cook for another 2 minutes.
Place dish in a serving plate and enjoy!
Inspired by Yummy.