Includes butternut, buttercup, Hokkaido, kabocha, delicate, acorn, pumpkin. An important source of carotenoids, including lutein and zeaxanthin, as well as vitamin A, C, B1, B3, B5, and B6, potassium, fiber, folate, and copper, these sweet, starchy veggies lend themselves to roasting in the oven, stewing, in soups, casseroles, and desserts.