In a small bowl add your soy sauce, oyster sauce, hoisin sauce, sugar, corn starch, and water.
Stir to combine.
In the Instant Pot add your pork, and onion.
Cook until almost done add your sauce,
Stir to combine.
Saute for 5 minutes.
Once done remove from the Instant Pot and set to the side.
Clean the Instant Pot and dry.
In a small bowl add your flour, instant yeast, and sugar.
Stir to combine.
Add your flour mixture to a stand mixer, use a dough hook attachment.
Add your room temp water to the mixture.
Knead the dough mixture for 5 minutes.
Add in the salt and continue to knead until the dough is smooth.
LET it rest, covered, till double, about 45 mins.
Roll the dough out on a flour coated surface.
Using a 4-5 inch circle cookie cutter, cut your buns out.
Work with one dough at a time.
Place the filling at the center and then gather the sides to enclose
the bun and pinch to seal.
Cover with a clean cloth and let them proof for about 15 minutes.
Let the dough rise at room temperature.
This may take about 10-15 mins at warm temperature.
Pour 1 cup of water into the inner pot of Instant Pot.
Place a metal trivet in there.
You can use either a bamboo basket or a plate to steam the buns.
Place it on top of the trivet.
Arrange 3-4 proofed buns in the basket or on a plate.
Close the lid.
Turn the steam release valve to "sealing".
Press "Steamer" and set the timer to 3 minutes.
After 3 minutes of steaming, wait 1 minute and then release pressure.
Serve and enjoy..