Preheat the cast iron and oven

• Place the cast iron pan in the oven and preheat to 260 °C (500 °F).
• Lower the oven temperature to 220 °C (425 °F).

Spray the hot pan

• Carefully take the hot pan out and spray it with oil.

Layer the toppings

• Arrange the pepperoni in the pan.
• Add the diced ham, canned mushrooms and sliced jalapeños.
• Scatter the grated mozzarella over the top.

Add sauce and seasonings

• Spread the pizza sauce over the cheese.
• Season with garlic salt, Italian seasoning and parmesan.

Roll and top with the dough

• Roll the dough out larger than the pan.
• Press Italian seasoning and parmesan into the dough.
• Lay the dough over the pan and tuck the edges down around the filling.

Bake

• Bake on the bottom rack, then finish on the top rack until golden.

Rest and flip

• Let the pizza sit in the pan for a minute or two.
• Flip it onto a board or plate and let everything fall into place.
• Pat it down and serve hot.