Step 1: Coat the Chicken

1. In a bowl, mix cornstarch, flour, salt, black pepper, and garlic powder.
2. In a separate bowl, whisk the eggs with ¼ cup water.
3. Dip each chicken piece into the egg mixture, then coat in the cornstarch-flour mixture. Shake off excess.

Step 2: Fry the Chicken

1. Heat vegetable oil in a deep pan over medium-high heat until it reaches 350°F (175°C).
2. Fry the chicken in batches for 4-5 minutes per batch, until golden and crispy.
3. Remove and drain on a paper towel-lined plate.

Step 3: Make the Orange Sauce

1. In a saucepan over medium heat, add orange juice, orange zest, honey, soy sauce, rice vinegar, garlic, ginger, and red pepper flakes.
2. Bring to a gentle simmer, then stir in the cornstarch slurry (cornstarch mixed with water).
3. Cook for 2-3 minutes, stirring continuously, until the sauce thickens.

Step 4: Toss the Chicken in the Sauce

1. Reduce heat to low and add the fried chicken pieces to the sauce.
2. Toss until fully coated and glossy.

Step 5: Garnish and Serve

1. Sprinkle with sesame seeds and chopped green onions.
2. Serve immediately with steamed rice, noodles, or stir-fried veggies.