Add olive oil to a 12-inch cast iron skillet and place dough into the skillet. Using your fingertips spread the dough as close to the edge as possible. It will shrink slightly back but you should have no more than 1-inch space between the dough and the pan.
Sprinkle the dough with garlic powder and set aside.
Preheat your oven to 425 degrees F.
In a skillet set over medium heat add your sausage. Break up the sausage while it browns.
When the sausage is browned, add the broccoli rabe to the skillet, cover it, and let steam for a few minutes to help soften.
Start preparing your pizza by spreading out the marinara sauce, leaving about 1 inch from the edge of the dough sauce free.
Sprinkle with 2 tablespoons of shredded Parmesan cheese, Romano cheese, and 1/2 cup shredded mozzarella cheese.
Top with crumbled sausage and steamed broccoli rabe. Top with remaining cheese and crushed red pepper.
Add to the oven and bake for 15-20 minutes or until the crust is fully cooked and the top of the pizza is golden brown. You know the dough is cooked because the bottom of the pizza will be golden in color. You can check this by gently lifting up the pizza and checking the color.
Rest in the pan for 5 minutes, sprinkle with grated Parmesan cheese, remove from the skillet, slice, and enjoy.