Preheat oven to 400ºF.
Slice your cauliflower into ½ inch thick steaks. Make sure to keep the stem of the cauliflower intact so your steaks don’t turn into florets. Reserve the rest of the cauliflower that has fallen apart for later. You may only get a few “steaks” from each head of cauliflower. With practice, you can squeeze one or two more.
Drizzle olive oil generously on your pan. You may want to line the pan with parchment paper to make cleanup easier.
Place cauliflower steaks on pan. Drizzle again with olive oil.
Bake cauliflower in oven for about 10 minutes until slightly softened and browned on edges.
Remove from oven and top with marinara sauce, cheeses, and your toppings of choice.
Return to oven and bake until bubbly and crispy 10-20 minutes.