Carefully open the box of tofu and drain the excess water. Place tofu on a large plate (silken tofu is really delicate). Let the tofu sit for 10 minutes because it will continue to release water. Pour excess water out. You can also steam the tofu on a plate for 6-8 minutes (in the whole form) or boil it for 1-2 minutes if you want this to be a hot dish. I like it cold or room temperature.
Heat oil in a small pot on medium heat. Once oil is hot, add the garlic and chopped green onions. Stir continuously for about 45-60 seconds, being careful not to burn the garlic. Turn heat to low. Add the rest of the sauce ingredients. Stir for another 30 seconds.
Drizzle sauce over the cold (or hot) tofu. Use a spoon to serve the tofu or you can cut it with a knife. Enjoy with steamed rice!