Put the leftovers into a bowl, pour on some cream and 1-2 eggs along with a bit of salt and black pepper. Mix with a spoon or fork.
Mix one part butter, three parts flour and one part water until you have a dough piece that will cover your oven-prrof form's bottom and a bit up the sides.
Massage the dough into the form and pour in the letfover mix. Add the cheese on top of it all. Put it in the middle of the oven on 175-200 Degrees Celsius, until the cheese begin to get a brownish tint, then put on some french herbs and let be for couple of minutes.