- step: Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
- step: Trim the outer leaves of the cauliflower head, ensuring the central stem remains completely intact.
- step: Using a sharp chef's knife, slice the cauliflower down the center into thick, 1-inch slabs. Keep the core attached to prevent the steaks from crumbling.
- step: Arrange the intact steaks on your prepared sheet pan. Reserve any loose outer florets for future roasting.
- step: In a small bowl, combine the olive oil, garlic powder, Italian seasoning, salt, and pepper. Brush this mixture generously onto both sides of each cauliflower steak.
- step: Roast in the oven for 20 minutes, using a wide spatula to gently flip the steaks over halfway through. The cauliflower should be tender and show beautiful crispy, golden edges.
- step: Remove the pan from the oven. Spread about 2 tablespoons of marinara sauce evenly across the surface of each roasted slab.
- step: Top generously with the shredded mozzarella cheese and scatter the mini pepperoni slices evenly across the top.
- step: Return to the oven and bake for 5 to 7 minutes until the cheese is melted and bubbling. Turn on the broiler for the last 1 to 2 minutes to beautifully toast the cheese layer.
- step: Garnish with freshly torn basil leaves and a pinch of crushed red pepper flakes. Allow to cool for 2 minutes, then serve hot using a wide spatula.