If you have filling mixture left over in stage 10, pour it into small dishes and cook at the same time as the loaf for handy, crustless mini-quiches to save for another meal.
Remarks
This recipe is a great way to use up bread that would otherwise go to waste. There is no need to use a fresh loaf; on the contrary, drier bread is easier to cut.
The proportions for the filling are for guidance, so you may need to adapt them to suit the size of your loaf.