Wash and totally dry kale pieces. Any remaining water will turn your chips soggy.
Spray or toss kale with olive oil, gently massaging the leaves to coat them evenly. Add lemon pepper seasoning, salt, and ground mustard and toss to evenly season the kale.
Pre-heat the air fryer to 375°F (or 370° if you don't have a 375° setting). Add kale in a single layer to the air fryer basket. You may need to do this in batches depending on the size of your air fryer. Air fry the kale for 3-4 minutes, tossing halfway through. Be sure to check it frequently towards the end to ensure the kale doesn't burn.
Serve with garlic aioli, if desired. Store leftovers in an air tight container or bag at room temperature for 2-3 days.
Notes
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