1. Peel the onion and cut it into thin rings. Add the spaetzle to the air fryer basket (without any wire rack or similar), then distribute the grated cheese and onion rings evenly on top. Pour the heavy cream all over the spaetzle and season with some salt and pepper.

2. Remove the oven cheese from its packaging and make deep crosswise cuts in the surface. Place it on top of the spaetzle and bake/air fry at 170°C (340°F) for about 15 minutes. Check on it occasionally and gently pull the melted cheese apart. Depending on the power of your air fryer, it may take a little longer (or it may take less time) for the cheese to melt completely.

3. Once the time is up, mix the melted cheese with the spaetzle, then divide it among plates, sprinkle with some chopped parsley (optional), and serve.