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.
Story Behind this Recipe
When I felt like having some bread pudding while alone, I impulsively came up with this recipe while using a previous microwaved custard pudding recipe that I liked as a reference. I used 1 mug + 1 spoon to make it simple.
To prevent it from overflowing, fill the cup with bread only up to about 90% of the way. While microwaving, keep your eye on it. If it seems like it is going to gush out, stop heating it. Let it rest and then heat it up again. The cooking time will differ depending on your microwave, so adjust accordingly.