01 - Peel, core, and slice apples into 1/4-inch wedges, ensuring uniform thickness for even cooking.
02 - Whisk together melted butter, granulated sugar, and ground cinnamon in a mixing bowl until smooth.
03 - Add apple wedges to the butter mixture, tossing thoroughly to ensure every slice is evenly coated.
04 - Combine oats or breadcrumbs, flour, and salt in a separate bowl, mixing until well incorporated.
05 - Dredge each buttered apple slice in the dry mixture, pressing gently to adhere the coating.
06 - Place coated apple slices in a single layer in the air fryer basket, avoiding overlap for proper crisping.
07 - Cook at 375°F for 10-12 minutes, shaking the basket halfway through cooking, until golden brown and crispy.
08 - Serve warm, optionally topped with whipped cream or vanilla ice cream for added richness.