Can I add shredded mozzarella cheese to my delivery pizza?

Microwaved pizza isn’t very good. Bread gets changed in the microwave. You can do it for ten seconds to take the chill off, but if you really want to melt the cheese it’s better under the broiler for two minutes. You have to watch closely so you don’t burn the pizza. I have a toaster oven, so I’d probably just stick a couple slices in there and toast or broil, if the slices fit.

There are special pizza heating containers for the microwave that are supposed to keep the bread crisp. Here is one, but there are others. I have no idea if they work well. https://www.asseenontvexpress.com/products/reheatza-microwave-crisper?variant=12442349830205&utm_campaign=gs-2018-08-06&utm_source=google&utm_medium=smart_campaign

Edit: I found this amazon review https://www.amazon.com/Allstar-Innovations-Reheatza-Microwave-Crisper/product-reviews/B075VF8W7R watch the warnings about how hot the pan gets.

Once you buy it you can add any topping you would like to a pizza, if you get my meaning Mr. Frodo, just watch out for those second degree burns from hot cheese.

Yes.

You might get better results if you pop it into a regular oven at, say, 425 degrees for a minute or two…

The best way to reheat pizza is to put it in a pre-heated 350 degree oven using a preheated cast iron skillet. That crisps up the crust, and then only heats but not destroys the toppings.

You can do anything you want

Directions for reheating leftover pizza.

1) Take two slices of pizza out of the refrigerator.
2) Place one slice on a paper towel in the center of the microwave. Close the door
3) Set the microwave to 27 seconds (if using an 1100 watt unit, longer if less)
4) Press the ON button.
5) Begin eating the other piece cold while waiting for the first one to warm properly.
6) Once heating is completed, open the door and remove the now warmed slice.
7) Place the slice on the counter
8) Finish eating the cold piece while waiting for the hot one to cool off.

@all Update: I cooked two slices of ham and pineapple pizza in the oven for 350 Celsius for 10 minutes and added a generous amount of shredded mozzarella cheese. Was awesome. Thanks All.

I buy Totinos frozen pizza because I really like the crust. The pizzas are always short of toppings, but no big deal, toppings can be added. It works fine with any pizza, that just happens to be my favorite.
The thing about mozzarella, melting gets the stretch, but for the best flavor, you want some brown toasty spots. You can’t get those in a microwave. You have to put it in a toaster oven or regular oven.
You can also add any precooked meats you like.
I have sometimes added so much stuff to my frozen pizzas, they end up over two inches thick.