One whole yam, through the juicer. Nothing more, nothing less.
I imagined it'd need plenty more, however it tasted awesome.
Then of course I added more to see what would happen. More = cinnamon, vanilla, a tiny bit of molasses. Then we had liquid pumpkin pie. Win. win.
"Sweet potatoes are one of the greatest sources of beta-carotene of all vegetables, even higher than carrots. Only 112 calories (a small sweet potato) contains 369% of your daily need of vitamin A. They are also plenteous in vitamin C, potassium, calcium, and carbohydrates, and are a good source of fiber. Surprisingly, they are even a rare low-fat source of vitamin E. Choosing from 58 vegetables, the Center for Science in the Public Interest ranked sweet potatoes as number one in Vitamins A and C, folate, iron, copper calcium, and fiber, far below the white potato. History has shown that people can live exclusively on sweet potatoes and remain healthy and strong."