Place the chicken breasts in a freezer baggie. Add in the soy sauce, sesame oil, fresh ginger, and black pepper. Refrigerate for at least 2 hours or up to 24 hours.
Heat a medium skillet over medium heat. Add the chicken breasts and cook for 5-7 minutes per side or until cooked through. Remove to a cutting board and let rest for 3 minutes.
Divide the Ginger Bok Choy Salad mix between two plates. Sprinkle with peanuts.
Cut the chicken breasts into 8 pieces. Divide between the two salads. Drizzle with sesame ginger salad dressing.