1Trim excess fat and membranes from the chicken breast.
2Prepare aromatic water by mixing scallions, ginger, and smashed garlic with warm water in a bowl.
3Squeeze the aromatics in the water to release flavor, then strain the water and set aside.
4Slice the chicken breast into thin pieces and freeze together with the strained scallion-ginger-garlic water for 2 hours.
5Place the frozen chicken in a food processor along with salt, white pepper powder, sugar, baking soda, msg, and tapioca starch. Process until combined.
6Add the egg white and process again.
7Gradually add the scallion-ginger-garlic water in three batches, processing in between until the mixture is thick and sticky.
8Shape the mixture into balls and drop into a pot of water that is heated to just below boiling (small bubbles forming).
9Cook the meatballs over low heat for 7-8 minutes.
10Remove the meatballs and submerge in ice water for 1 minute.