Begin by making the Orange Caramel Sauce: In a three- quart saucepan, heat the vegetable oil on medium heat and add the chilis, sugar, ginger, orange juice, garlic, vinegar, soy sauce, and sesame oil. Bring to a boil and then add 2 tsp. cornstarch mixed with 4 tsp. of water and simmer until the sauce gets thick and syrupy about 5 minutes. Set aside.
Next, fry the Crispy Orange Caramel Chicken: Start by heating one inch of vegetable oil in a deep pot, to 375°.
In a large bowl, beat the egg, sugar, and salt together. Stir in the chicken. Add the cornstarch and stir until all the chicken is coated.
When the oil is at 375°, fry the chicken pieces in three batches until the coating is starts to turn golden and crisp. Drain each batch on a wire rack. Then, refry all the chicken a second time, in 3 batches, until they are super crispy.
Meanwhile, reheat the sauce. When the chicken is all done, toss them with the sauce in a large bowl and serve. Sprinkle with the orange zest and serve with the orange slices.