Cut a pocket into each chicken breast. Place a cheese slice on top of a slice of ham, then another slice of ham and cheese. Roll them up so the cheese is inside. Place the rolls inside each pocket and close them with 2 toothpicks if necessary.
In a small bowl, mix the mayonnaise, mustard, and a dash of salt and pepper together. Spread it in a thin layer all over the chicken.
Place the breadcrumbs on a large, shallow plate. Carefully roll the chicken in the breadcrumbs until fully coated.
Preheat the air fryer to 370 degrees F then place the chicken in a single layer inside. Spray the top of the chicken with cooking oil spray.
Air fry for 20-25 minutes, or until the internal temperature reaches 165 degrees F.
While the chicken is cooking, make the sauce: melt the butter in a small saucepan set over medium heat. Whisk in flour and cook for 1 minute.
Slowly whisk in the milk and whisk until the mixture is blended and smooth.
Add the mustard and Parmesan and simmer for 2-3 minutes, whisking constantly, until thickened. Season with salt and pepper to taste. Serve over chicken.
Notes
Cook frozen chicken cordon bleu in a preheated air fryer at 380 degrees F for 18 to 20 minutes.
This nutrition information is based on the exact products I used in this recipe. Brands and sizes of products could alter exact nutrition and should always be calculated independently.