Reheating the leftover pizza. There are a couple of approaches to reheating leftovers. You can heat it in a 350ºF oven for 10 minutes or so, on a Silpat- or parchment paper-lined baking sheet. Or you can nuke it for 45 seconds; meanwhile, heat a lidded skillet with a little olive oil over medium-high heat. Add in the pizza pieces, put the lid back, reduce the heat to medium and cook for 3 to 5 minutes. We prefer the latter approach for this type of pizza. It makes the bottom slightly crispy—a nice extra with the already deliciously browned, crispy cheesy edges.