Heat a wok on medium high. Add sesame oil, when about to smoke, add ginger and garlic. “Pow” or stir fry for 1-2 minutes until fragrant.
Add chicken pieces and brown chicken.
Add soy sauces and sugar and toss to coat. Add sherry and water, cover and simmer under low heat for 10 minutes, stirring occasionally.
Add a little more water if it dries out.