Sprinkle the cubed chicken with cornstarch, dry sherry, and soy sauce.
Toss to coat well and set aside.
Stirfry the green pepper in the oil for 1 minute.
Stirfry for 1 to 2 minutes.
Stirfry chicken 2 to 3 minutes, until done.
Add hoisin sauce and cashews.
Reheat and stir briefly.
Serve at once.