You may use black kale, spinach, or beet greens but the flavor will be slightly different. (bluebirdgrainfarms.com)
Also located on the hotel's premises is a dining venue that serves nutritional foods including yogurt, goji berries, and black kale salad, as well as hand - crafted cocktails made from organic ingredients. (frequentbusinesstraveler.com)
I have a green smoothie every morning myself (I love black kale in it!) (withfoodandlove.com)