Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup if desired.
Remove any outer leaves from the cabbage and rinse the head under cold water.
Place the cabbage on a cutting board and slice it into 1-inch thick steaks. You should be able to get about 4-5 good steaks from the head.
Lay the cabbage steaks flat on the prepared baking sheet.
In a small bowl, mix together the olive oil, garlic powder, onion powder, smoked paprika, salt, and black pepper.
Using a pastry brush or spoon, evenly coat both sides of the cabbage steaks with the olive oil mixture.
Roast in the preheated oven for 15-20 minutes, flipping halfway through, until the edges are golden and crispy.
Remove from the oven and let cool slightly before serving. Garnish with fresh herbs, if desired.