Preheat oven to 400 F degrees.
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.
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.