If you have dried bread you don't know what to do of, do this:
In a bowl put some sugar (any amount you want, than crack an egg (crack two if you have a lot of bread)
Then put some milk (like a glass/cup) and mix it together until you feel it's good enough.
Cut your dry bread in slices that can fit in the bowl.
Duck the bread slices in the bowl so it gets drenched with the preparation. Make sure not to do it to long so it doesn't crumble.
Then heat up a frying pan, put some butter in it.
When the butter has melted put your drenched bread slices in the frying pan and let it rest, moving it from times to times so it doesn't burn.
Return the slices too so both can fry.
Do this until both sides are golden.
Put it in a plate and put some sugar on it until you're satisfied.
And there you go. This is called Pain Perdu (Lost Bread in french)