Cold pizza for breakfast is nothing to apologize for, but I prefer hot pizza. What are you going to do when you roll out of bed, though? Preheat the oven?
Luckily, there’s a better way to reheat one or two slices. It’s not only faster, but you get crisper, fresher-tasting pizza, too. I can’t take an ounce of credit for this: I learned it from tommy on eGullet.
Put the pizza *topping-side down* in a cold cast-iron or nonstick skillet. Place over medium heat. When the pizza starts to sizzle, render some fat, and brown a bit, flip it over. Cook a couple minutes on the crust side, then eat immediately. I’m eating a slice of The Works Primo from Pagliacci right now and it’s like I’m *there.* Okay, *there* is only six blocks away, but still, try this.