I always wished that one of the local restaurants in my town would make pizza the night before and have it cooled and ready for breakfast the following morning. I would love to see a diner with $1 or $2 slices on the menu along side eggs, french toast, etc.
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Hot pizza>cold pizza>reheated pizza. Reheated pizza tastes odd to me, no matter how its done. Cold pizza is way better than hot pizza for breakfast though. I do find, however, that pizza with lots of sauce gets kinda nasty tasting when its cold. So if I plan to save it, I ask for less sauce than normal.