
Preheat the oven to 425°F and line a baking sheet with parchment paper.
Slice the cabbage vertically into 1-inch-thick steaks and arrange in a single layer on the prepared baking sheet.
In a small bowl, stir together the olive oil, garlic powder, and salt. Brush half onto the cabbage steaks, flip, and brush with remaining oil.
Roast for 30-40 minutes until well browned and tender, seasoning with salt and pepper to taste.
Serve as a side dish with lemon wedges or as a vegetarian main.