Mix the poultry seasoning, marjoram, shallot, paprika, garlic powder, parsley, true lemon, salt and black pepper in a grinder or with a mortar and pestle.
Put the mustard in a small bowl. Add the vinegar and oil. Whisk until an emulsion forms
Add the spices and mix thoroughly together.
Add the cornstarch and mix completely.
Rub the chicken with mix and place it in the refrigerator to marinate for two hours.
Using your hand, make a space between the skin and flesh. Rub extra marinade in there and refrigerate for another hour.
Secure the chicken on the spit and put it in the air fryer.
Set the air fryer on rotisserie mode at 380 F / 193 C for 20 minutes.
Check the temperature by putting the instant read thermometer into the deepest part of the thigh. It should read 165 F / 73 C.
Let chicken rest in the air fryer for about 5 minutes, then let it rest again for another 5 minutes before removing from the spit.
Use poultry shears to cut the chicken in half along the center of the breast bone.
Notes
If you have a larger bird, cut it in quarters.
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