Combine all ingredients for meatballs in large mixing bowl. Cover and refrigerate 30 minutes.
Roll chicken mixture into golf-ball-size meatballs. Coat top of Air Fry Kit with nonstick cooking spray and arrange meatballs in a single layer. Spritz top of meatballs with water. Place Air Fry Kit into machine. Press “Air Fry” button and rotate knob to navigate to 400° and press knob to set temperature. Rotate knob to navigate to 20 minutes and press to start, cooking meatballs until golden-brown and cooked through to internal temperature of 165°F.
Combine heavy cream, mustard, lemon juice, pepper and Parmesan in medium
microwave safe bowl. When meatballs are done, remove Air Fry Kit and place bowl onto turntable. Press “Micro” and press start to confirm 100% power level. Rotate knob to 30 seconds and press “Start” to heat sauce. Remove sauce from microwave and stir.
Serve meatballs with creamy Dijon sauce and garnish with fresh parsley.