Break the egg into the mug and beat. Add the sugar and mix.
Fill the mug with milk until about 2/3 filled. Stir.
Chop the bread into pieces and sink into the bread mixture. Lightly cover with plastic wrap.
Microwave while keeping an eye on it. When it seems like it will boil over, let it rest a bit. Once it has calmed, microwave again. The total microwaved time should be 3-5 minutes.
Once the egg mixture becomes jelly-like, it's done Optionally top with honey or jam and enjoy.
It was delicious. This was the only thing I had to wash.