Do you think I could make this the night before, or is it really best within a few hours?

Thank you all!

I ended up liking it better hot than room temp. I have never held it over night as a whole quiche, but I do microwave leftover wedges and it is a great and easy way to reheat.

Definitely make it the night before. Tastes even better that way. I do as Barbara does, serve it at room temp.

You can definitely make it the night before. You can reheat it as Monita suggests, or serve it at room temperature. (I do this all the time. It's one of my regular recipes.)

Sounds like a plan. Thanks!

I think you can make this night before. Re-heat at 200 and I would do it uncovered so you aren't steaming up the quiche