01 -
Adjust the oven rack to the highest position and set the broiler to its highest heat.
02 -
Warm a cast iron skillet on medium heat until it's nice and warm but not super hot.
03 -
Evenly spread out the shredded cheese over the whole base of the skillet.
04 -
Keep an eye on the cheese as it starts melting and bubbling, which should take about 2 to 3 minutes.
05 -
Keep cooking until the bottom of the melted cheese turns crispy.
06 -
Take it off the heat and allow the cheese crust to cool for roughly two minutes.
07 -
Spread the marinara sauce over the cooled cheese crust, being careful to cover it evenly.
08 -
Arrange your chosen toppings evenly on top of the sauce.
09 -
Put the skillet under the broiler for about 2 to 3 minutes, keeping a close watch during this step.
10 -
Cook just until the toppings are heated and the cheese is fully melted but not browned.
11 -
Take the skillet out of the oven and let it sit for 3 to 5 minutes.
12 -
Allow the cheese crust to harden up before you cut it into slices.