Prepare the steamer. Place the drained tofu on a heatproof dish (I used a ceramic bowl) big enough to fit the tofu and its sauce. Slice into thinner slices, about ½ inch thickness. Gently tilt the bowl to remove the liquid from the tofu. Place the bowl over the steamer and steam using medium heat for 7-8 minutes.
Combine the ingredients for the sauce in a small bowl. Set aside.
Heat the oil in a small frying pan. Add the ginger and cook until it’s starting to brown. Add the garlic and the white parts of the green onion. Stir fry for a minute. Then, mix in the prepared sauce. Switch heat to the lowest setting to keep the sauce hot while you take out the tofu out of the steamer.
Remove the tofu from the steamer and carefully discard the liquid that’s released while steaming.
Quickly pour the sauce evenly over the steamed tofu and serve while hot.
Notes
*You can also steam the tofu whole (without cutting). Just steam longer, about 15 minutes.