01 - Peel, core, and slice the apples into 1/4-inch thick wedges for even cooking.
02 - In a mixing bowl, whisk together melted butter, granulated sugar, and ground cinnamon until fully combined. Add apple wedges and toss thoroughly to ensure each slice is evenly coated.
03 - In a separate bowl, combine quick oats (or gluten-free breadcrumbs), flour, and salt. Mix well to distribute ingredients evenly.
04 - Dredge the buttered apple wedges in the oat-flour 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 optimal crisping.
06 - Cook at 375°F for 10 to 12 minutes, shaking the basket halfway through cooking time. The apples are done when they achieve a golden-brown color and crispy texture.
07 - Transfer to a serving dish and enjoy immediately, topped with whipped cream or vanilla ice cream if desired.