Step 1: Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easy cleanup and to prevent sticking.
Step 2: Prepare the cabbage. Remove any loose or damaged outer leaves from the cabbage. With a sharp chef's knife, carefully slice the entire head of cabbage into 3/4 to 1-inch thick 'steaks' or rounds. Keep the core intact as much as possible in each slice; this helps hold the 'steaks' together during roasting. You should get about 4-6 good slices, depending on the size of your cabbage.
Step 3: Arrange the cabbage steaks in a single layer on the prepared baking sheet. Ensure they are not overlapping, as overcrowding will steam them instead of roasting, preventing crispy edges.
Step 4: Drizzle the olive oil evenly over both sides of the cabbage steaks. Using a pastry brush or your clean hands, ensure each side is lightly coated.
Step 5: In a small bowl, combine the garlic powder, onion powder, smoked paprika (if using), salt, and black pepper. Sprinkle this seasoning mix generously over both sides of the cabbage steaks. Don't be shy!
Step 6: Roast for 15 minutes. Then, carefully flip the cabbage steaks. Return to the oven and roast for another 10-15 minutes, or until the edges are beautifully golden brown and crispy, and the cabbage is tender when pierced with a fork.
Step 7: Remove from the oven. Serve your delicious Roasted Cabbage Steaks immediately as a fantastic side dish. Garnish with fresh parsley or a drizzle of balsamic glaze if desired. Enjoy the unexpected flavor of this simple vegetable!