128 ounce can whole tomatoes, drained and crushed with hands
1/4teaspooncrushed red pepper
Preheat oven to 430 degrees.
Make the meatballs by combining sausage, minced onion, minced garlic, egg and bread crumbs in a bowl. Mix well and roll into about 15 meatballs.
Heat olive oil in a skillet over medium heat. Cook meatballs until browned on all sides and cooked through, turning often, 10 - 15 minutes.
While meatballs are cooking, combine all ingredients for the marinara together in a small saucepan. Bring to a boil and reduce heat to a simmer.
Remove meatballs from the skillet. Set aside.
Press the pizza dough into the bottom of a 12-inch cast iron skillet. Place skillet on a burner over medium heat. Spoon sauce over the top. Top with cheese, meatballs and remaining sliced onion. Allow to cook on the stove for 5 minutes. Transfer pizza to preheated oven and cook for 12 - 15 more minutes or until cheese is melted and bubbly and crust has browned.