Lay out wax or parchment paper on a sheet pan, and lay your split english muffins open side up. You can also lay it on the counter on parchment paper.
Begin by adding tomato sauce to each one and spread evenly.
Next, sprinkle the desired amount of cheese to each one.
Last, add pepperoni to the top.
To store these, lay a gallon size bag on the counter and layer the pizzas inside separating each layer with a piece of parchment or wax paper. I use the same parchment I used for assembly and cut it to fit so I don't waste.
Make sure you hold them flat and lay them flat in your freezer.
When you are ready to eat one, preheat your oven to 400℉ , watch them carefully taking them out when the cheese has fully melted to your desired taste. About 10 minutes.