First, heat up a nonstick pan on medium to meduim-high heat and put in the slice of pizza.
Next cover the pan, and let it cook for 5 minutes.
When you're done, hopefully you'll have something that looks like this:
The hot pan will get the pizza crust nice and crispy. And with the lid on, the cheese will get good and melty. Mmmmmm.
Make sure you don't cook the pizza for too long though. The first time I tried this, I didn't set a timer and the crust became quite black. If you do burn the crust, take the pan outside before you take the lid off. That way all the smoke will stay outside of your house and won't set off your smoke alarms.