Preheat the oven to 425 degrees, with the cast iron skillet or pizza stone you are going to use inside the oven. You want to get your cast iron nice and piping hot before adding the discard to it.
Once the oven is preheated and the cast iron is hot, remove it from the oven.
Sprinkle a little bit of olive oil, or spread a little bit of butter in the pan.
Scoop your sourdough discard right onto the hot pan, spreading it into a circle as you go. The amount will depend on the size of your pan, but you want the crust to be about 1/4″ thick on the pan. Start with about 1/2 cup of sourdough discard and add more if you need it. It will start sizzling and cooking, that’s good!
Sprinkle the top of the sourdough discard with Italian seasoning or your choice of herbs.
Put the cast iron back in the oven, and cook for 15-20 minutes or until the edges of the crust are turning golden brown, and it is starting to pull away from the pan slightly.
Add your favorite pizza toppings, and return to the oven.
Cook for an additional 5 minutes, or until the cheese is melted.
Let the pizza cool slightly, then cut into slices and serve!