Add cold pizza to a frying pan and heat over medium-low heat. Once the bottom is crisped up and hot, add a few drops of water to the pan (not on top of the pizza!), reduce heat to low and cover with a lid. Let steam until the cheese is warmed through and melted.
Preheat the oven, with a baking sheet on the middle rack, to 230°C/450°F. Once both the oven and baking sheet are preheated, remove the hot baking sheet and place cold pizza on top. Return to the oven and bake at 275°C/575°F for approx. 5 min., or until heated through.
Place your cold pizza on a baking sheet and loosely cover with aluminum foil. Transfer to a cold oven, then turn the oven on to 275°C/575°F. Bake for approx. 25 min., then uncover and enjoy!
