“What ever happened to pie?” is a common refrain in the Chang-Myers household. My husband grew up near diners and pie bakeries and is frustrated by the lack of pie available these days, at least near us in Boston. He’s right. I went in search of a birthday pie for him when we first started dating, and I came up empty. That’s a shame, because making a pie, as you’ll see, is generally simple and straightforward. You do need a pie pan (glass, ceramic, or even a disposable—actually, recyclable—