The customary greens are couve Galega (Gallician kale, which comes from Galicia, Spain). It has broad dark-green leaves and thick, fibrous white stems. It's related to other common vegetables such as cabbage and broccoli. Unlike collards or kale in America, which are low-growing plants, Portuguese kale or collard greens grow on thick stalks to immense heights. While traveling through the Minho, I saw men standing on six-foot ladders to harvest the leaves, hence one of its many nicknames: "Portuguese walking stick cabbage."