Spaghetti Squash Gratin

I promised you a recipe for that leftover spaghetti squash, and you're gonna get it.  You're also going to see how I eat when I'm cooking for just myself.  Things rarely make sense, and I really just indulge my cravings.  PB&J with truffle fries?  Why not?  Actually, I haven't done that yet, but now I'm seriously considering it.  Squash gratin and rosemary bread topped with pepperoni, chopped olives, and peppadews?  It's so, so right.