I couldn't find the Panda Express Black Pepper Chicken. Maybe this one will do in the meantime.

Ah Sa Wan Restaurant Black Pepper Chicken

1/4 teaspoon salt
1/2 teaspoon sugar
1 dash soy sauce
1 dash white pepper
1 1/2 teaspoon cornstarch; divided
1 cup chicken breast; sliced
2 tablespoons vegetable oil; divided
1 teaspoon chopped garlic
1 cup sliced onion
1/2 teaspoon ground black pepper
1 cup sliced celery
1 cup sliced green pepper
1 cup carrot slices; 1/4-inch
1/2 cup baby corn
1/2 cup water
1/2 teaspoon hot chili oil
2 teaspoons Water

In a bowl, combine salt, sugar, soy sauce, white pepper and 1/2 tsp. cornstarch; add chicken and coat all sides. Let rest for about 15 minutes.

In a wok or large pan, heat 1 tablespoon of the vegetable oil, saute marinated chicken, cook 3 minutes or until barely cooked through; remove chicken and drain.

Heat the remaining tablespoon oil in wok, add garlic and onion, saute until golden brown.

Add chicken and black pepper with remaining vegetables. Add 1/2 cup water and chili oil.

Mix 1 teaspoon cornstarch with 2 teaspoons water. Add to chicken mixture and cook until mixture thickens.