Start by removing and discarding the outer layer of the cabbage along with any limp leaves. Rinse the cabbage head, then slice it into even pieces.
Add the seasoning and gently massage it into the cabbage slices. This step helps soften the cabbage and allows it to absorb the flavors more evenly—a technique commonly used with kale for the same reason.
Arrange the cabbage on a baking sheet and roast in a 400°F oven for 20–25 minutes, flipping halfway through, until tender with lightly crisped edges.
Notes
* Use 2 pans if the cabbage is large. Overcrowding the cabbage will lead to "steaming" instead of "roasting".The reason I used avocado oil is that it has a high smoking point. But you can use any cooking oil you have in hand.