Put all ingredients in a bowl and mix to marinate the pork for 15 minutes while you prepare other things
Prepare the egg mixture:
Bring the water in the steamer to a boil. Crack three eggs in a bowl. Combine water and cornstarch and stir to mix and then add to the eggs and use a whisk to mix until combine but not too vigorously that you create too much bubbles
To steam:
Spread the marinated pork on a wide shallow type of bowl. Pour the eggs mixture through a sieve on top of the eggs. This step is optional. My mom never did this and some home cooks I know didn't do this as well. If you prefer silky smooth texture, then run the egg mixture through the sieve. Pop as much bubbles as you can
Wrap the lid of the steamer with a cloth to prevent water dripping back on the eggs. Steam over high heat for 1 minute and then lower the heat to low and steam for 15 minutes or until the egg custard is set but still jiggly but no longer watery
To serve:
Drizzle a bit of soy sauce and garnish with some chopped green onion and cilantro leaves if you prefer. Serve immediately