Preheat oven to 475°F.
Toss sliced potatoes with 1 tablespoon olive oil. Place on 2 parchment paper lined baking sheets. Season with salt and pepper. Bake until tender, about 10 minutes. Remove from oven and set aside. Reduce oven temperature to 400°F.
Heat 1 tablespoon of olive oil in a large skillet over medium heat. Add cabbage and season with salt and pepper. Cook until tender and slightly caramelized, stirring occasionally, about 5-10 minutes.
Spread pizza dough onto a baking sheet and pre-bake the dough for 8 minutes.
Top pre-baked pizza crust with cheddar cheese and potatoes. Then top with mozzarella, cabbage, and corned beef.
Bake until golden brown and cheese is melted, approximately 10 minutes.
Top with Parmesan cheese. Top with Thousand Island Salad Dressing (optional).