Cut the chicken into inch size pieces.Add the flour to a bowl. Crack the egg in another bowl and beat with a fork.Dip each chicken piece in the egg and then into the flour, turning to coat evenly. Place the chicken in the air fryer basket. Repeat with remaining chicken.Spray lightly with olive oil cooking spray. Set the air fryer to 390 degrees for 15 to 18 minutes, shake the basket halfway through cooking.Remove the chicken and place in a bowl. Add the General Tso sauce and toss until evenly coated.Serve over rice and broccoli and sprinkle with sesame seeds if desired.