01 - Peel, core, and slice the apples into 1/4-inch thick wedges.
02 - In a mixing bowl, whisk together melted butter, granulated sugar, and ground cinnamon until well combined.
03 - Add apple wedges to the cinnamon butter mixture and toss thoroughly to ensure even coating on all pieces.
04 - In a separate bowl, combine quick oats (or gluten-free breadcrumbs), flour, and salt. Mix until uniform.
05 - Transfer buttered apple slices to the dry mixture and dredge each piece to coat completely with the oat-flour blend.
06 - Place coated apple slices in a single layer in the air fryer basket, ensuring pieces do not overlap for even crisping.
07 - Cook at 375°F for 10 to 12 minutes, shaking the basket halfway through cooking time, until apples achieve golden color and crispy texture.
08 - Remove from air fryer and serve immediately while warm, optionally topped with whipped cream or vanilla ice cream.