Green plantains are distinguished by their age. They are simply the younger immature stage of the fruit. Their peel is thin and they have a very firm and starchy textured, lean-flavored flesh due to their very low sugar content. As plantains ripen, they develop a sweet taste and their color changes from green to yellow to black.
Mustard greens are an excellent source of many vitamins including vitamin K, vitamin A (in the form of beta-carotene), vitamin C and vitamin E. They are also an excellent source of the minerals copper, manganese, and calcium.
Spinach (Spinacia oleracea) is an edible flowering plant in the family Amaranthaceae native to central and western Asia. Its leaves are commonly eaten as a vegetable, either fresh, frozen, canned, chipped, or dehydrated.