You can warm up refrigerated or frozen pizzas without using a microwave by using alternative cooking methods. Here are a few options:
Oven: Preheat your conventional oven to around 375°F (190°C). Place the pizza directly on the oven rack or on a baking sheet. Cook for about 10-15 minutes or until the crust is crispy and the cheese is melted to your desired level.
Toaster Oven: If you have a toaster oven, it's an excellent alternative for reheating pizza. Preheat the toaster oven to 375°F (190°C) and place the pizza on the oven rack or a baking sheet. Heat for 5-10 minutes or until the pizza is heated through.
Skillet or Pan: Using a skillet or pan on the stovetop can work well too. Place the pizza slice(s) in the pan over medium-low heat. Cover the pan with a lid or foil to help melt the cheese. Heat for a few minutes until the pizza is warmed up.
Grill: If you have an outdoor grill, you can reheat pizza on it as well. Preheat the grill to medium heat and place the pizza directly on the grates. Close the lid and cook for a few minutes until the cheese melts and the crust becomes crispy.
Regardless of the method you choose, keep an eye on the pizza to avoid burning or overcooking. Different methods and pizza thicknesses may require slight adjustments in cooking time, so use your judgment and preferences. Reheating in an oven or toaster oven often yields the best results for a crispy crust and evenly melted cheese, similar to the original fresh-baked pizza.