It being such a special Pi Day, however, a single quiche seemed insufficient (and, also, I was hungry) so I opted to make an apple tart/pie/thing with what apple we had in the house. Mrs Tebbens struck again, as I used one whole apple, a couple of half apples, and insufficient dough and improvised streusel to create the second pie for the day.
This experiment in thrift was also quite fine. As it happens quiche and apple pie have the same oven requirements; ten minutes at 450 followed by half an hour, or a little longer, at 350. It's like the baking gods smiled upon my Pi Day experiments.