Using a rolling pin, roll the slices of bread out lightly so that the crusty edges are flattened slightly. Spread a heaped Tbsp of nutella over the surface, then arrange over some sliced strawberries. Roll the bread up into a cylinder. 

Place the rolls, seam side down, into your air fryer, then brush the tops of the rolls with the melted butter. 

Air fry at 200°C for about 8 minutes, until golden brown and crispy. 

Add the sugar and cinnamon to a small bowl and toss together, until combined. Roll the roll ups in the cinnamon sugar to coat. 

Drizzle over any remaining nutella to serve.