Brush about 2 Tbsp of olive oil onto a baking sheet.
Prepare the cabbage by pulling off any dirty or wilted outer leaves. Using a sharp knife, cut the cabbage into 1” thick slices. Rub the garlic cloves on each side of the cabbage and place on the baking sheet. Brush remaining olive oil onto cabbage slices and top with salt and pepper.
Bake for 30 minutes, until edges of the slices are slightly browned.