Preheat your oven to 425℉ and line your large rimmed baking sheet with parchment paper.
DO NOT trim your cabbage stem/core - leave it intact. Slice your cabbage first in half, then into thick slices. You should end up with 6 or 7 slices/steaks.
In a glass measure cup combine the olive oil, grated parm, spices listed and salt and pepper to taste. Brush this mixture on both sides of each cabbage piece and bake for 30 minutes or until golden.
Toppings:
Top each steak with 1 tbs of either the marinara or pesto and spread out evenly with the back of your spoon. Sprinkle with mozzarella and top with pepperoni (or feta and min red peppers), dried oregano and chili pepper flakes. Pop back in the oven until cheese is melted - a few minutes.