1Preheat the pan — Preheat a cast-iron pan to about 500 degrees, then lower the oven temperature to 425.
2Prepare the dough — Buy dough from your grocer's bakery and follow the directions on the package. Roll it out bigger than the pan. Roll in some Italian seasoning and Parmesan cheese.
3Build the pizza — Spray the pan. Add the pepperoni, diced ham, canned mushrooms, freshly grated cheese, jalapenos, pizza sauce, garlic salt, and Parmesan cheese.
4Tuck the edges — Tuck down the edges of the dough.
5Bake the pizza — Bake on the bottom rack for about 25 minutes.
6Flip the pizza — Wait one to two minutes before flipping it, then wait for everything to fall.