Bring water to a gentle boil with ginger slices and a whole scallion. This creates a fragrant base that flavors the chicken naturally. Keep the heat steady for best results. The aroma will begin developing immediately.
Add chicken pieces to the pot and reduce the heat to a low simmer. Cover and cook gently to prevent overcooking. This slow method keeps the meat soft and juicy. Proper temperature control is key here.
After simmering, turn off the heat and let the chicken sit covered. Then transfer it to an ice bath to stop cooking. This step ensures a silky texture. It also helps the meat stay firm for slicing or shredding.
Heat vegetable oil in a saucepan over medium-low heat. Cook the scallion whites until lightly browned and fragrant. This step builds deep flavor. The oil absorbs the scallion aroma.
Add soy sauce, sugar, and reserved poaching liquid to the pan. Bring it to a boil, then stir in ginger and scallion greens. The sauce should taste balanced and savory. Remove from heat once combined.
Shred or slice the chicken and arrange it on a serving plate. Spoon the warm sauce generously over the top. Serve immediately for best flavor. Enjoy every tender bite.