Creating this incredible Orange Chicken is simple when you follow these steps:

1. Prepare Chicken: In a medium bowl, season the chicken pieces with salt, black pepper, garlic powder, and onion powder.
2. Set Up Breading Station: Place flour, beaten eggs, and panko breadcrumbs into three separate bowls.
3. Bread the Chicken: Dredge each piece of chicken in flour, dip in the beaten eggs, and then coat with panko breadcrumbs. Set aside.
4. Heat Oil: In a large skillet, heat about 1 inch of vegetable oil over medium-high heat until shimmering.
5. Fry the Chicken: Carefully add the breaded chicken pieces to the hot oil in batches. Fry until golden brown and cooked through, about 5-7 minutes. Remove and drain on paper towels.
6. Prepare Sauce: In a saucepan, combine orange juice, orange zest, granulated sugar, soy sauce, and rice vinegar. Bring to a boil over medium heat.
7. Thicken Sauce (Optional): If you prefer a thicker sauce, mix cornstarch with a bit of cold water and stir it into the boiling sauce. Cook for an additional minute until thickened.
8. Combine Chicken and Sauce: Add the fried chicken to the sauce, stirring to coat each piece evenly.
9. Garnish and Serve: Sprinkle sesame seeds and sliced green onions over the top before serving.

These steps will guide you in creating this incredible Orange Chicken effortlessly.