Step 1

Sift flour, 2 tablespoons cornstarch, baking soda, and baking powder into a bowl. Pour in low-sodium soy sauce, sherry, 2 tablespoons water, vegetable oil, and a dash of sesame oil; stir until smooth. Stir in chicken until coated with the batter, then cover, and refrigerate for 20 minutes.

Step 2

Meanwhile, bring chicken broth, sugar, vinegar, dark soy sauce, sesame oil, chile paste, and garlic to a boil in a saucepan over high heat. Dissolve 1/4 cup cornstarch into 1/2 cup of water, and stir into boiling sauce. Simmer until the sauce thickens and turns clear, about 2 minutes. Reduce heat to low, and keep sauce warm.

Step 3

Heat olive oil in a deep fryer or large saucepan to a temperature of 375 degrees F (190 degrees C).

Step 4

Drop in the battered chicken pieces, a few at a time, and fry until they turn golden brown and float to the top of the oil, 3 to 4 minutes. Drain on a paper towel lined plate. To serve, place fried chicken pieces onto a serving platter, and pour the hot sauce overtop. Sprinkle with toasted sesame seeds to garnish.