Yes, you can reheat pizza in a microwave oven, and it's a quick and convenient method. Here's a simple step-by-step guide to do it:
Place the pizza slice on a microwave-safe plate. If you have multiple slices, make sure to leave some space between them for even heating.
If the pizza was refrigerated, you may want to take it out a few minutes before microwaving to let it come closer to room temperature. This helps to avoid uneven heating.
To prevent the crust from becoming soggy, you can put a microwave-safe cup of water in the microwave beside the plate with the pizza. This will help maintain a bit of moisture in the microwave.
Microwave the pizza on medium power or using the pizza reheat setting if your microwave has one. Avoid using the highest power setting, as it may cause the crust to become overly chewy or rubbery.
Heat the pizza in short intervals. Start with 30 seconds to 1 minute, depending on the wattage of your microwave. Check the pizza after each interval to see if it's hot enough to your liking.
If the pizza is still not as hot as you'd like, continue microwaving in 15- to 30-second intervals until it reaches the desired temperature.
Let the pizza sit for a minute or two after microwaving to allow the heat to distribute evenly before eating.
While microwaving is a quick method, it might not give you the crispy texture you get from oven reheating. If you prefer a crispier crust, you can use an oven or toaster oven instead. Preheat the oven to around 375°F (190°C) and heat the pizza for 5-10 minutes or until it's heated through and the crust reaches your desired level of crispiness.