Combine the MARINADE ingredients in a bowl and stir until the sugar dissolves. Add chicken and mix well. Allow it to marinate for at least 30 minutes, the longer the better.
In a separate bowl, combine the SAUCE ingredients and set aside.
When you're ready to cook, add cornstarch to the chicken and massage it in well.
Heat a tablespoon of oil in a wok or skillet over medium-high heat. Add ginger and garlic and stir fry until they become aromatic. Be careful not to burn the garlic.
Push the garlic and ginger to the edge of the pan and heat a bit more oil. Add the marinated chicken in a single layer and brown the chicken on both sides. It's okay if it's not fully cooked through at this point.
Keep an eye on the garlic and ginger. Give them a toss periodically so they don't burn.
Add the sauce mixture and basil. Continue tossing until the sauce thickens and the chicken is cooked through. Turn off the heat.
Add a light drizzle of sesame oil. Give it a final stir then serve.