Place a wok (or skillet) over medium-high heat, then add oil.
Once the is the oil is ready, add the pieces of tofu.
Fry the tofu for 8-10 minutes, or until they turn darker in color.
Remove the tofu from the wok and place them on kitchen paper to drain the excess oil.
Pour the frying oil out of the wok but leave about two tablespoons for stir-frying.
Add the minced garlic and cook until it becomes fragrant.
Add the bean sprouts.
Mix and cook for about 2 minutes.
Add the chopped chili, soy, and oyster sauce, then mix to combine evenly and cook for about a minute.
Add the fried tofu and the spring onions; mix everything and cook for about 1 to 2 minutes.
Transfer into plates, then serve.
* Garnish your stir-fried tofu and bean sprouts with more spring onions, if desired.