Preheat oven to 400 degrees Fahrenheit. Line a baking sheet with Gefen Parchment Paper and set aside. (You can also make this in a Betty Crocker pizza maker.)

In a bowl, whisk together the egg, yogurt, maple syrup, and optional flavoring of your choice.

Using your fingers or the back of a fork, press down the center of each slice of bread to create a space for the yogurt mixture. Make sure not to tear the bread.

Spoon the mixture into the indentation and add the toppings of your choice.

Place on the prepared baking sheet and bake for eight to 12 minutes, until the edges are lightly browned and the custard center is set.

Serve as is or top with maple syrup and/or confectioners’ sugar.