Creating the perfect Orange Chicken can be achieved by following these concise steps:

1. Marinate Chicken: Season the chicken pieces with salt and pepper. Allow it to marinate for about 15 minutes.
2. Prepare Batter: In a medium bowl, combine the flour and cornstarch. In another bowl, whisk the eggs.
3. Coat Chicken: Dip each chicken piece first in the egg, then coat it with the flour mixture.
4. Heat Oil: In a large frying pan, heat about 1 inch of vegetable oil over medium-high heat.
5. Fry Chicken: Carefully add the coated chicken to the hot oil, working in batches if necessary. Fry until golden brown, about 5-7 minutes per batch. Remove and drain on paper towels.
6. Make Orange Sauce: In a separate saucepan, combine orange juice, orange zest, sugar, soy sauce, rice vinegar, ginger, garlic, and red pepper flakes. Bring to a simmer, stirring until the sugar is dissolved.
7. Thicken Sauce: In a small bowl, mix cornstarch with a tablespoon of water. Stir this mixture into the sauce and cook until it thickens, about 2-3 minutes.
8. Combine: Toss the fried chicken pieces in the orange sauce, ensuring they are well coated.
9. Serve Immediately: Transfer the orange chicken to a serving plate or bowl.

By following these steps, you will have successfully prepared delicious Orange Chicken that rivals any restaurant’s version.