In a medium bowl, mix the diced apples, brown sugar, cinnamon, and lemon juice until the apples are evenly coated. Let the mixture sit for 5–10 minutes.

If your apples are very firm, microwave the mixture for 30–60 seconds to slightly soften them before filling, or roast the apple mixture on a sheet at 375°F for 10 minutes.

Place a few spoonfuls of the apple mixture on each tortilla and sprinkle with granola.

Roll up the tortillas tightly, tucking the filling in as you go so the seam is secure.

Spray the air fryer basket with cooking spray and place the taquitos seam-side down in a single layer, without crowding.

Spray the tops lightly with cooking spray to help them turn golden-brown.

Air fry at 400°F (200°C) for 8–10 minutes until crispy and golden, flipping halfway through if necessary.

Remove carefully with tongs and let cool for a minute, then dust with powdered sugar before serving.

Serve warm for the best texture and flavor.