Preheat the oven at 180°C
In a small bowl, whisk together the egg, yogurt and honey.
Using your fingers or the back of a spoon or fork, press into the centre of the bread to indent and create a well without cutting through.
Put the custard mixture into the indented well and add your toppings on top.
Bake for 8-12 minutes. The custard should be set and starting to caramelise on the edges when ready.