How To Heat Frozen Cooked Pizza Slices. Place the pizza on a cookie sheet, freeze, and then bag] step two: Place frozen cut slices of pizza directly on center rack, no pan or sheet.
(this was a large slice, and it was perfectly done in 15 minutes) You can use an oven, skillet, microwave, or a toaster oven. (following our topping arrangement tip as described above.) then sprinkle more shredded cheese on top, because you can never have too much cheese.