In a medium-sized bowl, stir together the mashed potatoes, turkey, celery, green onion, Dijon mustard, celery salt and garlic powder (if using). Taste and adjust seasoning as needed. Stir in 3 tablespoons of the whisked egg and ¼ cup of the panko breadcrumbs. Set aside the remaining egg and breadcrumbs in seprate bowls.
Use ¼ cup of the mixture for each patty. Use your hands to form into patties that are half an inch thick.
Stir the kosher salt into the breadcrumbs. Dip one patty into the whisked egg, letting the excess drip off. Transfer to panko breadcrumbs and coat the patty. Lightly shake off the excess crumbs. Place on a baking sheet lined with wax paper or parchment paper. Repeat with the remaining ingredients. Chill in the refrigerator for 15 to 20 minutes.
Preheat the air fryer to 360 degrees F. Lightly coat the top side of half of the patties with olive oil spray or avocado spray. I like to use air fryer parchment paper squares to stop the patties from sticking to the air fryer basket. If you don't have these, lightly coat the bottom of the basket with cooking spray.
Cook at 360 degrees F for 6 minutes, then carefully turn the patties. Spray with oil on the new top sides and cook until the patties are turning and crispy, about 11 minutes more. Repeat with the remaining patties. Serve with preferred sauces, such as yogurt dill sauce, ketchup or pepper jelly.
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Notes
I used my Rosemary Mashed Potatoes recipe.Please note that I am not a medical or nutritional professional. I provide nutritional information for my recipes as a courtesy to my readers. It is calculated using the built-in recipe card calculator. While I attempt to provide information that is as accurate as possible, you should calculate the nutritional information independently before relying on it.