Peel and chop the apples into small chunks and place them in an air fryer safe baking tin. Sprinkle 2 tablespoons of water over the top of them.

Air fryer at 180°C for 15 minutes, or until the apple chunks soften.

While the apples are in the air fryer, you can make the crumble mixture. In a mixing bowl, combine the flour and butter. Using your hands, rub it together until it resembles breadcrumbs and then add the sugar and ground cinnamon, stirring it in. Alternatively, you can use a food processor but be careful not to over-process; the crumble needs to have enough texture and not be too fine.

When the apples are ready, add the crumble mixture on top.

Close the air fryer basket and continue to air fry at the same temperature for a further 10 minutes, checking on it to make sure it isn't burning. When the crumble is crispy and golden, it is ready.

Tastes great with custard or ice cream.