Boil water on medium heat. Add green onions, slices of ginger and cooking wine (optional). When the water is boiling, add chicken and cook for 20-25 minutes.
While the chicken is cooking, make the scallion oil. Add green onions and purple onion to 1 cup of avocado oil. Once added, then turn on the heat to medium and fry for 10-12 minutes.
Fry onions while mixing together until they are golden (brown is OK). Make sure it is not too hot so you don’t burn the onions. Keep temperature at 285-300F.
Once golden, take the onions out of the oil and turn off heat.
The chicken should be done after 20-25 minutes, check with a thermometer to see if the chicken is at 165 degrees Fahrenheit. Then transfer to ice bath.
Shred chicken in small pieces.
To make the sauce, grate garlic and ginger and place in a bowl. Add sliced green onions, sesame seeds and chopped chili (optional). Heat up the scallion oil until hot and add ½ cup of oil in the bowl until your desired taste. Watch it sizzle. Then, add oyster sauce and soy sauce. Mix together.
Add the sauce in the chicken (to taste) and mix together. Garnish with sliced cucumber. You can eat right away or place in the fridge for up to one day and eat it cold!