Yes, you can microwave a frozen pie without preheating. However, there are some important steps to follow to ensure that the pie is heated evenly and thoroughly.
Remove any plastic wrap or packaging: Before microwaving, make sure to remove any plastic wrap or packaging from the frozen pie. Microwaving plastic is not safe and may cause harmful chemicals to leach into the food.
Use a microwave-safe plate: Place the frozen pie on a microwave-safe plate. Ensure that the plate is large enough to accommodate the entire pie without it hanging over the edges.
Cover the pie with a microwave-safe lid or microwave-safe microwaveable cover: This step helps to keep the moisture in and allows for more even heating. You can use a microwave-safe lid or a microwave-safe microwaveable cover to cover the pie.
Microwave on medium power: It's best to microwave the pie on medium power to avoid overcooking the edges while the center remains frozen. Microwaving on a lower power setting allows the heat to penetrate more evenly throughout the pie.
Microwave in short intervals: Heat the pie in short intervals, such as 2-3 minutes at a time, depending on the wattage of your microwave. Check the pie's temperature and rotate it if necessary to ensure even heating.
Use a microwave thermometer: If you have one, use a microwave-safe thermometer to check the internal temperature of the pie. The pie should reach an internal temperature of 165°F (74°C) to be safe to eat.
Finish with conventional baking (optional): If you want a crispier crust, you can finish the pie in a conventional oven after microwaving. Follow the baking instructions on the pie's packaging.
Always follow the manufacturer's instructions for microwaving the frozen pie if provided. Keep in mind that microwaves vary in power, so the heating time may differ based on your specific microwave. It's essential to monitor the pie carefully during the microwaving process to prevent overcooking or undercooking.