Why do leftovers taste better?

Why do leftovers taste better? [3586A]

[written in answer space:  scarcity principle]

Good guess, Secret Scribbler, but I don’t think so.  The correct answer is gristle. That’s right: gristle, that crusty, crunchy, delicious stuff that bakes around the edges of leftovers (especially those with cheese).  Oh, yeah!