In the bowl of a stand mixer add in wondra, egg, and baking powder. Mix with dough hook.
Add a half the milk and mix for a 2 minutes. Add the remainder of the milk and mix another 3 minutes until mixture resembles dough.
Place a pot of water on to boil.
Make the dough into two and make little loaves out of it. (do not knead)
Place in water and use wooden spoon to make sure they float.
Cook on each side for 10 minutes. Roll the dough over after 10 minutes.
Remove to cutting board and slice with baker's twine or bread knife.
Video
Notes
You may also add stale bread in 1/2 inch pieces if you would like. This is the simplest way without using stale bread. If you do add it only add 2 1/2 inch slice cut up into squares.