01 - Peel, core, and slice apples into 1/4-inch thick wedges.
02 - In a mixing bowl, whisk together melted butter, granulated sugar, and ground cinnamon until well combined. Add apple wedges and toss gently to coat every slice evenly.
03 - In a separate bowl, combine quick oats (or gluten-free breadcrumbs), flour, and salt. Mix thoroughly to distribute ingredients evenly.
04 - Dredge each butter-coated apple wedge in the dry mixture, pressing gently to adhere the coating to all surfaces.
05 - Place coated apple slices in a single layer in the air fryer basket, ensuring pieces do not overlap for even crisping.
06 - Cook at 375°F for 10 to 12 minutes, shaking the basket halfway through cooking time. Apples are done when golden brown and crispy.
07 - Serve immediately while warm. Top with whipped cream or vanilla ice cream if desired.