Preheat your air fryer to 350°F. (see notes below for oven instructions)
Using a fork or your fingers, gently press down in the middle of your bread slices. You want to create a well in the center of your bread for your custard to rest in. (see the video for a demonstration)
Place your bread on to the tray for your air fryer.
In a small bowl whisk together the egg, yogurt, and honey.
If you're making the chocolate strawberry toast, gently spoon some custard over your slice of bread until the custard fills the center of the bread but isn't running over the sides.
Add the lemon zest to the bowl of remaining custard and whisk to combine.
Top your remaining bread slices with the lemon custard.
Air fry your bread for about 5 minutes until the center is set. Keep an eye on it to be sure the top doesn't brown too much or burn.
Top your lemon custard with fresh raspberries, and the plain custard with strawberries.
Drizzle the raspberry toast with a bit more honey and a pinch of lemon zest.
Top the strawberry toast with a drizzle of hazelnut spread. If the spread isn't soft enough to drizzle you can melt it in the microwave for 10-20 seconds.