Slicing the Onion: Start by slicing the onion into thin rings. Aim for uniform thickness for even cooking. A good thickness is about 1/4 inch.
Preparing Bowls: Prepare three bowls: one with 1/2 cup of all-purpose flour, the second with 1 beaten egg, and in the third bowl, mix 1/2 cup of panko breadcrumbs with 1/2 teaspoon garlic powder, 1/2 teaspoon paprika, along with salt and pepper to taste.
Coating the Onion Rings: Dredge each onion ring in the flour, ensuring it is completely coated. Next, dip the floured onion ring into the beaten egg, letting any excess drip off. Finally, coat the ring with the breadcrumb mixture, pressing lightly to ensure it adheres well.
Preheating the Air Fryer: Preheat the air fryer to 375°F (190°C) for 3-5 minutes. This step is crucial as it helps achieve an even crisp on the outside.
Preparing the Air Fryer Basket: Lightly spray the air fryer basket with olive oil spray to ensure the onion rings do not stick and to help them crisp up.
Air Frying: Place the coated onion rings in a single layer in the air fryer basket. Be sure not to overcrowd them. Air fry for 8-10 minutes, flipping halfway through cooking, until they are golden brown and crispy.