All the food mentioned here has no nutritional value. Microwave also destroys nutrients. We're giving ours away, and it's a nice KitchenAid above the range. Replacing it with a shelf.
The cheese makes an insulating blanket trapping in the heat. That's why when you lift the cheese on a slice of pizza, the steam escapes. Cutting it into tiny pieces helps if you have a fork and knife (more surface area).