01 - Peel, core, and slice the apples into 1/4-inch wedges.
02 - In a bowl, combine melted butter, sugar, and cinnamon. Add apple slices and toss to coat evenly.
03 - In a separate bowl, mix oats or breadcrumbs, flour, and salt until well combined.
04 - Dredge the buttered apple slices in the dry mixture, pressing gently to adhere the coating.
05 - Place the coated slices in a single layer in the air fryer basket, ensuring pieces do not overlap.
06 - Cook at 375°F for 10 to 12 minutes, shaking the basket halfway through cooking, until apples are golden brown and crispy.
07 - Serve warm, topped with whipped cream or vanilla ice cream if desired.