While the chicken is frying, you can prepare the General Tso's sauce. In a saucepan, heat a tablespoon of oil over medium heat.
Add the minced ginger, garlic, and dried red chili peppers (or red pepper flakes). Sauté for about a minute until fragrant.
Pour in the soy sauce, rice vinegar, hoisin sauce, and both types of sugar. Stir well to combine. Let the mixture simmer for a few minutes, allowing the sugars to dissolve and the flavors to meld.
In a separate small bowl, dissolve a tablespoon of cornstarch in two tablespoons of water to create a slurry. Pour this into the simmering sauce and stir continuously. The sauce will begin to thicken and become glossy. Once it reaches your desired consistency, remove it from the heat. The sauce should coat the back of a spoon without running off.
Stir in the sesame oil. Sesame oil has a strong flavor, so a little goes a long way. Taste the sauce and adjust the sweetness, saltiness, or spiciness to your preference by adding more sugar, soy sauce, or chili peppers.